Quadrant Model of Reality Book 7 Art

Painting

The four cardinal virtues. 1. Codex Aureus of St. Emmeram, Late 10th century; 2. Gospel of Hitda of Meschede, c. 1030. 3. Rhenish Sacramentarium, early 11th century; 4. Sacramentarium of Marmoutier, Autun. 1/2/3 in: KATZENELLENBOGEN (1939). 4. HUBERT et al. (1968/1970).

The ‘quadriga virtutum‘ was in Carolingian times the symbol of the human soul as a carriage with four horses. The wheels gave a further reference to the dynamic character. The cardinal virtues referred to a ‘cardo‘ or pivot, which makes a door turn. The virtues should be regarded, in a metaphorical sense, as the pivot in a human life. In the process of self-knowledge (‘gnothi seauton‘) the division was thought of in qualities, which could improve the quality of life.

‘Num, inquid, currui tuo quartam deese non sentis rotam?’ (Can’t you see that you don’t have the fourth wheel of the wagon), that is the strong remark of count Liuthar to Ekkehard of Meissen and recorded by the German historian Thietmar of Merseburg. It was said on a meeting in the year 1002 AD, concerning the succession to the throne after the sudden death of Otto III in Italy.

HLAWITSCHKA (1978) made an in-depth survey what this expression could mean. He quoted the classical understanding that Ekkehard was no direct relative of the king and had no chance of succession (mangelnde Verwantschaft). Modern investigations resulted in a better insight in the family-relations of the German king and this view did not support the classical interpretation of the expression of Liuthar.

So one has to look further. Searching for an expression which consists of four parts (of which Ekkehard is clearly one missing). There is the (modern) phrase ‘the fifth wheel’, meaning ‘the odd one out’, but this does not refer to a fourth wheel. May be the expression was an invention of the historian Thietmar himself. But what did it mean?

Hlawitschka suggested that the lack of a fourth element (in the character of Ekkehard of Meissen) was a reference to the four cardinal virtues: Prudentia (wisdom/caution), Iustitia (justice), Fortitudo (fortitude/courage) and Temperantia (temperance). His interpretation was based on a common knowledge of the four virtues (‘quadratura mistica‘) in the centuries before and after the first millicennium. Alcuin, Hrabanus Maurus, Halitgar of Cambrai, Ermenrich of Ellwangen and many others used the motif. In particular the Carolingian illustrations provided many examples (‘Besonders sprechend sind die Bildzeugnisse für die Kardinaltugenden in der Karolingischen Malerei‘). Hlawitschka referred to the article of KATZENELLENBOGEN (1939) on the allegories of the virtues and vices in mediaeval art.

The motif of the wheel in relation to the quadripartite division was known to Julianus Pomerius (end fifth century), who recorded in his book ‘De Vita Contemplativa‘: ‘Sed et quatuor flumina quae de paradisi fonte procedunt, vel quatuor Evangelia, divini currus rotae quatuor, et animalia, alae eorum quatuor et facies, dignitatem numeri hujus abunde commendant‘ (MIGNE, 1844/64, PL. 59, Sp. 501). And to the question why there are four is the answer: ‘Quaternarium numerum perfectioni sacratum pene nullus ignorat‘ (EHRHARDT, 1945).

The expression of the historian Thietmar about the fourth wheel should be read as follows: ‘Ekkehard, you are not fit for the kingship, because you lack one of the four cardinal virtues’. Which virtue can only be guessed at, but Thietmar despised Ekkehard’s egocentric actions and blamed him for his lack of humility (‘humilitas‘). The most likely deficient virtue would therefore, be Justitia or Temperantia. In the end, Ekkehard efforts to gain the throne failed, because he was soon afterwards killed by rivaling parties.

This story proves to a certain extend also the importance of tetradic thinking around the year 1000, because it was not necessary to explain this frame of mind to the readers. The same holds for the illustration of the four Christian nations (Slavonia, Germania, Gallia, and Roma), bringing honor to emperor Otto III (fig. 348). Apparently, the symbolism of the tetrad was so strongly embedded in the mind of the intelligentsia at the beginning of the eleventh century, that no further explanation was necessary, being it either four wheels on a carriage or four women bowing for a throne.

Plato mentioned the (four) virtues in the ‘Politeia‘ (MÄHL, 1969). Aristotle, although an important tetradic-minded philosopher, did not separate them. His inquiries tended towards the logical and physical/biological aspects of the cosmos. Even the Greek cultural development was (at that time) not advanced enough to isolate man completely from his surroundings. This could only happen in the declining years of the cultural period, when the philosopher Zenon of Citium (on Cyprus) – living in the third century BC – gave the virtues a central place as a condition of human happiness. Zenon was the founder of the school of philosophy in the ‘Stoa Poecile’ (‘painted arcade’). He mentioned the four principal virtues in a (lost) work on the affects: ————————— Prudentia wisdom/caution ————————— Fortitudo courage/power ————————— Temperantia temperance/consideration ————————— Justitia justice/righteous Since then these virtues are also called the stoic virtues. They coincide with the four positions in a (quadralectic) communication: I. Prudence as a beginning and end, with all the opportunities of an unknown future and the knowledge of an invisible past; II. Fortitude as a dynamic interference with the universe, a time of decision and action; III. Temperance as a tightening up of the reins, establishing the boundaries and obeying them. And finally, IV. Justice as a fair and right way to deal with (the feelings of) other human beings.

The temperaments of Francisco Goya (1746 – 1828). Four pen drawings by Goya (1797/1798). Prado, Madrid. In: NORDSTROM (1961; 1962) and WYNDHAM LEWIS (1968). A comparison between the different interpretations of the temperaments and their associated animals is given below:

It is recorded in the nursery rhyme (song in a four-poster bed): . fourposter ———— Matthew, Mark, Luke and John, ———— Bless the bed that I lie on. ———— Two to foot and two to head, ———— Four to carry me when I’m dead.

Early Christian (Latin) Bible texts – in particular those of North-African origin – gave a different sequence of the evangelists: Matthew, John, Luke and Mark. Their sequence changed to the present one (Matthew, Mark, Luke, John) only at the end of the fourth century (384 AD), in the Latin translation by St. Jerome, the so-called ‘Vulgata‘ (HENDERSON, 1987).

The symbolism of the four evangelists is derived from the Bible book Ezekiel and the Revelations of St. John. Ezekiel wrote his visions during the Babylonian exile. He saw a whirlwind coming from the north, with a great cloud and a fire. In it, he saw four living creatures (called the ‘zooia‘ in the Revelations of St. John). The ‘tetramorph‘ became the symbol of the four evangelists and was compared to the works of Christ (MEYR, 1975

Known as Ganga-Satluj Ka Maidaan (गँगा सतलज का मैदान), this area is drained by 16 major rivers. The major Himalayan Rivers are the Indus, Ganges, and Brahmaputra. These rivers are long,and are joined by many large and important tributaries. Himalayan rivers have long courses from their source to sea.(in India Arabian sea and Bay of Bengal) 16 is the squares of the quadrant model

The period of renewed attention of the virtues took place in the Roman cultural presence during the first half of the first century BC. It found in Cicero (106 – 43 BC) its most important representative. The three books of the ‘De officiis‘ were inspired by the work of the Stoic Panaetius, living in the second century BC. The cardinal virtues were summed up as follows (MILLER, 1921; Book I, V): 1. The full perception and intelligent development of the true (wisdom); 2. The conservation of organized society, with rendering to every man his due, and with the faithful discharge of obligations assumed (justice); 3. The greatness and strength of a noble and invincible spirit (fortitude/ courage); 4. The orderliness and moderation of everything that is said and done, wherein consist temperance and self-control (temperance). It can be noted that, the sequence of the virtues does not follow the Greek/Zenonian succession. Cicero placed the courage in the Third Quadrant, and it became therefore the most ‘visible’ of the four virtues. Compared to the ‘classical’ sequence: (1) Prudence – (2) Fortitude – (3) Temperance – (4) Justice is the ‘Ciceronian’ order given as: 1 – 4 – 2 – 3. It is hard to prove that Cicero employed such a succession on purpose, but in the light of his position in the Roman cultural history – living in the (interpreted) third part of the Third Quadrant (III,3) – such a choice would be understandable. The theme of the virtues was further elaborated by the Church Fathers. Ambrosius (c. 340 – 397 AD) used – in his book ‘De officiis ministrorum‘ – the Platonic-Stoic quadripartite scheme of virtues, which was directly taken from Cicero (including the title). Ambrosius was, in his writings ‘In Lucam’ and ‘De Paradiso’, heavily indebted to Philo of Alexandria, by connecting the Rivers of Paradise with the four main virtues: ‘The Cardinal Virtues could also be set in a wider and more flexible context (..) by correlating them with other groups of four, such as the four Rivers of Paradise, the horns of the altar (horns of consecretation; fig. 344/345), the Evangelists, major prophets, early Fathers.’

The Saxophone Four was a saxophone quartet that played on Main Street U.S.A.. It consisted of members of the Main Street Philharmonic marching band. The group that performed as Main Street Saxophone Four now plays during live shows in the Storybook Circus part of Fantasyland: Giggle Gang and Wowzer.

In music there are four types of triads Use this chart to reference the four types of triads. Major Minor Augmented Diminished Major triads contain a major third and perfect fifth interval, symbolized: R 3 5 (or 0–4–7 as semitones) About this sound play minor triads contain a minor third, and perfect fifth, symbolized: R ♭3 5 (or 0–3–7) About this sound play diminished triads contain a minor third, and diminished fifth, symbolized: R ♭3 ♭5 (or 0–3–6) About this sound play augmented triads contain a major third, and augmented fifth, symbolized: R 3 ♯5 (or 0–4–8) About this sound play Major triads contain a major third with a minor third stacked above it, e.g., in the major triad C–E–G, the interval C–E is major third and E–G is a minor third. minor triads contain a minor third with a major third stacked above it, e.g., in the minor triad A–C–E (A minor), A–C is a minor third and C–E is a major third. diminished triads contain two minor thirds stacked, e.g., B–D–F (B dim) augmented triads contain two major thirds stacked, e.g., D–F♯–A♯ (D aug).

Jewish history works in strange and surprising ways. A perfect example is how the Diaspora spread from Babylonia to North Africa and Spain. Oddly enough, it began with a kidnapping. For centuries, the yeshivas of Babylonia, the birthplace of the Talmud, were the center of Jewish life. At the end of the 8th century, however, they faced a serious economic crisis, as yeshivas are wont to do. They therefore adopted the time-honored formula of sending fundraisers overseas. And because the situation was so desperate, they did not just send out any collectors. They sent the heads of the yeshivas themselves, along with their wives and families. The names of three of them are known to us: Rabbi Shmaryahu, Rabbi Chushiel, and Rabbi Moshe. The fourth man has remained anonymous. The four great rabbis set out together, but in those times, the Mediterranean was a dangerous place. Aside from the storms and the uncertain fate of ships, pirates abounded. And not only did these pirates look for booty, they looked for people whom they could kidnap and sell on the slave market. The pirates knew that if they could capture Jews, especially prominent Jews, they could collect a great ransom. Redeeming the kidnapped is one of the primary mitzvos of the Torah. We’re even allowed to sell a Torah scroll to raise money to save a Jew. Jewish law always had its priorities straight. Jews are not museums, not artifacts, and not a culture – we’re people. People have to be saved from kidnappers. A Torah scroll won’t do anyone any good if there are no Jews to learn from it. Aware of this, the pirates were always on the lookout. They had spies, informers who told them, “This-and-this ship is sailing from this-and-this port with these-and-these people.” The pirates got wind of the fact that there were four great rabbis on this ship, and two or three days out of port, the rabbis were captured. The rabbis were brought to the slave markets in Alexandria, where Rabbi Shmaryahu was ransomed. But the pirates were unable to get a high enough price for all four rabbis, so the remaining captives were brought west to the slave markets of Tunis and Fez. Back then, Tunis and Fez were like the Western frontier. There were Jews there, but they were never able to attract great rabbinic leadership. So now they saw a golden opportunity, and they struck a deal. They told the pirates, “Before we bid on the rabbis, we’d like to talk to them.” Then they made the rabbis an offer. They would ransom them, but they wanted them to stay and build up a thriving Jewish community. Rabbi Chushiel and his son Rabbi Chananel agreed. Rabbi Moshe was ransomed in Spain, though according to the legend, his wife, unfortunately, threw herself into the Mediterranean and drowned rather than submit to the advances of the pirate leader. The fourth rabbi was sold off in Sicily. From these rabbis grew strong Jewish communities, and that is how the scene began to shift. As we know from the history of American Jewry, it only takes a few great people to make a difference. The four rabbis built yeshivas, and eventually students emigrated to come and learn with them. They set a standard that changed the entire complexion of Jewish life so that within 50 to 80 years, North African Jewry no longer felt subservient to Babylonian rule. And that is how the west opened up. Jewish history develops through unexpected twists and turns.

e smaller four-cornered garment, the arba kanfos," that men wear throughout the day, there is also the larger tallis, which men wear only during the morning prayers. This is also called a tallis gadol, which means something like "large wrap-around garment." Some peoplecall this a "prayer shawl," but it is supposed to be much larger than a shawl. The tallis, since it has four corners, must also have tzitzis, and the Laws for them are the same.

Before putting on any four-cornered garment, we must carefully check each corner to make sure the tzitzis are on correctly. For example, every morning, when we get dressed, and we put on our small "arba kanfos," we may not put it on before we have checked to make sure the tzitzis are intact. If the tzitzis were bought from a reliable store, we do not have to check everything about the tzitzis. We just have to check that none of the strings have been torn off, and that each is at least about 1 and 1/2 inches long. If one string has torn and is now less than that length, the tzitzis are still acceptable. If two or more strings on the same corner have torn, and are both now shorter than 1 and 1/2 inches long, then the tzitzis are invalid and must be replaced. You can usually take it to a good Judaica store and ask them to do this for you for a small fee.

The same is true for a tallis, of course.

Hashem told Moses, Speak to the Children of Israel and tell them that they should make "tzitzis" on the corners of their clothing. This pertains to all generations of Jews. You shall put on the tzitzis of each corner one thread of t'chailes. You will have these tzitzis, and when you see them you will remember all the Commandments of Hashem and you will do them, and you will not pursue the desires of you hearts or eyes. So that you remember and do all My Commandments, and you will be holy to your G-d. For I am Hashem your G-d Who has taken you out of Egypt so that I could be your G-d. I am Hashem your G-d.

Art

painting

The Deposition (also called the Florence Pietà, the Bandini Pietà or The Lamentation over the Dead Christ) is a marble sculpture by the Italian High Renaissance master Michelangelo. The sculpture, on which Michelangelo worked between 1547 and 1553, depicts four figures: the dead body of Jesus Christ, newly taken down from the Cross, Nicodemus (or possibly Joseph of Arimathea), Mary Magdalene and the Virgin Mary. The sculpture is housed in the Museo dell'Opera del Duomo in Florence.

Duplo[1] (trademarked as DUPLO) is a product range of the construction toy Lego, designed for children aged 1½ to 5 years old. Duplo bricks are twice the length, height and width of traditional Lego bricks, making them easier to handle and less likely to be swallowed by younger children. Despite their size, they are still compatible with traditional Lego bricks. Initially launched in 1969, the Duplo range has gone on to include sets with figures, cars, houses and trains. This was one of the first plastic brick sets. Duplo is manufactured in Nyíregyháza, Hungary.[2] History Duplo bricks alongside a smaller red regular-sized Lego brick Duplo and regular-sized Lego compatibility demonstrated Duplo bricks were introduced in 1969, in four colors: red, yellow, blue, and white. The studs on the top of legos kind of fit a quadrant formation, and that is the method by which they are attached.

music

The modern banjo comes in a variety of forms, including four- and five-string versions. A six-string version, tuned and played similarly to a guitar, has gained popularity. In almost all of its forms, banjo playing is characterized by a fast arpeggiated plucking, though there are many different playing styles. Four-string banjos, both plectrum and tenor, can be used for chordal accompaniment (as in early jazz), for single string melody playing (as in Irish traditional music), in "chord melody" style (a succession of chords in which the highest notes carry the melody), in tremolo style (both on chords and single strings), and a mixed technique called duo style that combines single string tremolo and rhythm chords. Plectrum banjo Edit The plectrum banjo is a standard banjo without the short drone string. It usually has 22 frets on the neck and a scale length of 26 to 28 inches, and was originally tuned C3 G3 B3 D4. It can also be tuned like the top four strings of a guitar, which is known as "Chicago tuning." As the name suggests, it is usually played with a guitar-style pick (that is, a single one held between thumb and forefinger), unlike the five-string banjo, which is either played with a thumbpick and two fingerpicks, or with bare fingers. The plectrum banjo evolved out of the five-string banjo, to cater to styles of music involving strummed chords. The plectrum is also featured in many early jazz recordings and arrangements. The four-string banjo is used from time to time in musical theater. Examples include: Hello, Dolly!, Mame, Chicago, Cabaret, Oklahoma!, Half a Sixpence, Annie, Barnum, The Threepenny Opera, Monty Python's Spamalot, and countless others. Joe Raposo had used it variably in the imaginative 7-piece orchestration for the long-running TV show Sesame Street, and has sometimes had it overdubbed with itself or an electric guitar. The banjo is still (albeit rarely) in use in the show's arrangement currently.

J Kwon's song Tipsy was a hit when it came out. It begins with 1 here comes the 2 to the 3 to the 4. He begins it by saying the quadrant model four.

"Four Sticks" is a song by the English rock band Led Zeppelin from their 1971 fourth album and is the sixth track from the LP. The title came from the fact that drummer, John Bonham, played with two sets of two drumsticks, totalling four.[3] His decision to play the song with four sticks was a result of him being very frustrated with not being able to get the track down right during recordingsessions at Island Studios. After he grabbed the second pair of sticks and beat the drums as hard as he could, he recorded the perfect take and that was the one they kept. This song was particularly difficult to record, and required more takes than usual.[3] John Paul Jones played a VCS3 synthesizer on the track.

"Four Kicks" is the second single taken from Aha Shake Heartbreak which is the second album by the American rock band Kings of Leon. It peaked at number 24 in the UK singles chart and number 32 in the Irish singles chart. The song's name is reminiscent of Led Zeppelin's Four Sticks, as is the guitar riff.

There are four types of filters four basic types of filters: low-pass, high-pass, band-pass, and band-reject. Low-pass and high-pass filters should already be familiar to you—they are exactly like the "tone" knobs on a car stereo or boombox. A low-pass (also known as high-stop) filter stops, or attenuates, high frequencies while letting through low ones, while a high-pass (low-stop) filter does just the opposite.

Ireland has historically been divided into four provinces: Connacht, Leinster, Munster and Ulster.

Dance

In 1968 synchronised swimming became officially recognized by FINA as the fourth water sport next to swimming, platform diving and water polo. In the United States each swimmer may compete in up to three of the following routine events: solo, duet, trio, combo (consisting of eight to ten swimmers), and team (consisting of four to eight swimmers). The fourth is always different

In competitive diving, during the flight of the dive, one of four positions is assumed: straight – with no bend at the knees or hips (the hardest of the four) pike – with knees straight but a tight bend at the hips (the median in difficulty of the four.) The open pike is a variant where the arms are reached to the side, and the legs are brought straight out with a bend in the hips. tuck – body folded up in a tight ball, hands holding the shins and toes pointed (the easiest of the four.) free – indicates a twisting dive, and a combination of other positions. In the transition between two positions the diver may for example bend their legs or curve at the waist, and points will not be deducted for doing so. These positions are referred to by the letters A, B, C and D respectively.

artistic cycling is performed within a quadrant The riding area for artistic cycling is a wooden court, which also serves cycle ball competitions, that ranges in dimensions from 9 x 12 meters to 11 x 14 meters, where the maximum size is mandated for international competitions. Three concentric circles are taped or painted at the center of the court with diameters (measured to the outside edge of the line) of 0.5, 4, & 8 meters. Four half-meter hashes extend radially from the four quadrants of the middle circle. A clear area of 0.5 to 2 meters must be free of all immovable objects around the perimeter of the court. Two meters is required for international competitions.

Cycle speedway is raced by individuals, pairs or teams. Each race is contested by up to four riders, and a match normally consists of eight to twenty-four races. Points are awarded for placings in each race. A race day fixture might take in up to two, three or more matches. In a team event, the winning team is the one with most points at the end of the day. Races involve up to four riders racing anticlockwise round four laps of the track, the winner being the first across the line. The number of laps varies with the age of the riders but is usually 4 laps for a single race. Competitors use a lightweight single-speed bicycle equipped with a freewheel but without brakes, often a stripped-down mountain bike frame is adequate for beginners although specialist machines are used by the top racers. Riders slide their left foot along the track as they race round turns. Physical contact is legal and often necessary; clothing usually covers the whole body from the neck down, with padding for knees, elbows and hips; helmets are also required since their introduction in 1999,[citation needed] there has never been an accident in cycle speedway resulting in serious injury or death.

Four-cross (4X), also called mountain-cross, not to be confused with fourcross, is a relatively new style of mountain bike racing where four bikers race downhill on a prepared, BMX like, track, simply trying to get down first. These bikes are generally either full suspension with 3 to 4 inches of travel, or hardtails, and typically have relatively strong frames. They run a chainguide on front and gears on the back. They have slack head angles, short chainstays and low bottom brackets for good cornering and acceleration. In recent years the tracks raced on have been rougher and less like those used in BMX. The current world champion is Joost Wichman. Four-cross was added to the UCI Mountain Bike World Cup and the UCI Mountain Bike & Trials World Championships in 2002, replacing dual slalom. It was removed from the World Cup following the 2011 series. A replacement world series, the 4X Pro Tour, was launched in 2012.

Fourcross is a form of four-wheeled downhill mountain biking, pioneered in Canada and the United States. It has the benefit of being suitable for disabled riders. The sport each year is part of the Crankworx festival

Wind conditions can also make otherwise routine sections of a course potentially selective. Cyclists have been finding that three- or four-spoked composite front wheels are more stable when confronting crosswinds.[4] Crosswinds, particularly, alter the position of the "shadow" when drafting a rider, usually placing it diagonally behind the lead rider.

Capoeira (/ˌkæpuːˈɛərə/; Portuguese pronunciation: [kapuˈejɾɐ]) is a Brazilian martial art that combines elements of dance,[1][2][3] acrobatics[4] and music, and is sometimes referred to as a game. There are four basic kinds of songs in capoeira, the Ladaínha, Chula, Corrido and Quadra. The Ladaínha is a narrative solo sung only at the beginning of a roda, often by a mestre (master) or most respected capoeirista present. The solo is followed by a louvação, a call and response pattern that usually thanks God and one's master, among other things. Each call is usually repeated word-for-word by the responders. The Chula is a song where the singer part is much bigger than the chorus response, usually eight singer verses for one chorus response, but the proportion may vary. The Corrido is a song where the singer part and the chorus response are equal, normally two verses by two responses. Finally, the Quadra is a song where the same verse is repeated four times, either three singer verses followed by one chorus response, or one verse and one response.

Malla-yuddha (Devanagari: मल्लयुद्ध,[1] Bengali: মল্লযুদ্ধ, Kannada: ಮಲ್ಲಯುದ್ಧ, Telugu: మల్ల యుద్ధం malla-yuddhaṁ, Tamil: மல்யுத்தம் malyutham, Thai: มัลละยุทธ์ mạllayutṭh̒) is the traditional South Asian form of combat-wrestling[2] created in what is now India, Pakistan, Bangladesh, Nepal and Sri Lanka. It is closely related to Southeast Asian wrestling styles such as naban and is the ancestor of kusti. Malla-yuddha incorporates grappling, joint-breaking, punching, biting, choking and pressure point striking. Matches were traditionally codified into four types which progressed from purely sportive contests of strength to actual full-contact fights known as yuddha.[3] Due to the extreme violence, this final form is generally no longer practised. The second form, wherein the wrestlers attempt to lift each other off the ground for three seconds, still exists in south India. Additionally, malla-yuddha is divided into four styles, each named after Hindu gods and legendary fighters: Hanumanti concentrates on technical superiority, Jambuvanti uses locks and holds to force the opponent into submission, Jarasandhi concentrates on breaking the limbs and joints while Bhimaseni focuses on sheer strength.

Muay Thai] is referred to as the "Art of Eight Limbs" or the "Science of Eight Limbs", because it makes use of punches, kicks, elbows and knee strikes, thus using eight "points of contact", as opposed to "two points" (fists) in boxing and "four points" (hands and feet)

Pradal Serey (Khmer: ប្រដាល់សេរី) or Kun Khmer (Khmer: គុណខ្មែរ) is an unarmed martial art and combat sport from Cambodia.[1] In Khmer, pradal means fighting or boxing and serey means free. Thus, pradal serey may be translated as "free fighting". The sport consists of stand up striking and clinch fighting where the objective is to knock an opponent out, force a technical knockout, or win a match by points. Pradal Serey is most well known for its kicking technique, which generates power from hip rotation rather than snapping the leg, Pradal Serey consists of four types of strikes: punches, kicks, elbows and knee strikes.

Jūnshì Sǎndǎ (Mandarin Chinese, Military Free Fighting): A system of unarmed combat that was designed by Chinese Elite Forces based upon their intense study of traditional martial arts such as traditional Kung Fu, Shuai Jiao, Chin Na and modern hand-to-hand fighting and combat philosophy to develop a realistic system of unarmed fighting for the Chinese military. Jùnshì Sǎndǎ employs all parts of the body as anatomical weapons to attack and counter with, by using what the Chinese consider to be the four basic martial arts techniques: Da – Upper-Body Striking – using fists, open hands, fingers, elbows, shoulders, forearms and the head Ti – Lower-Body Striking – including kicks, knees and stomping Shuai – Throws – using Wrestling and Judo-like takedowns and sweeps, and Chin-Na – Seizing – which includes jointlocks, strangulation and other submissions

Savate (French pronunciation: [saˈvat]), also known as boxe française, French boxing, French kickboxing or French footfighting, is a French martial art which uses the hands and feet as weapons combining elements of western boxing with graceful kicking techniques. In competitive or competition savate which includes Assaut, Pre-Combat, and Combat types, there are only four kinds of kicks allowed along with four kinds of punches allowed: Kicks[edit] fouetté (literally "whip", roundhouse kick making contact with the toe—hard rubber-toed shoes are worn in practice and bouts), high (figure), medium (médian) or low (bas) chassé (side ("chassé lateral") or front ("chassé frontal") piston-action kick, high (figure), medium (médian) or low (bas) revers, frontal or lateral ("reverse" or hooking kick) making contact with the sole of the shoe, high (figure), medium (médian), or low (bas) coup de pied bas ("low kick", a front or sweep kick to the shin making contact with the inner edge of the shoe, performed with a characteristic backwards lean) low only[15][16] Punches[edit] direct bras avant (jab, lead hand) direct bras arrière (cross, rear hand) crochet (hook, bent arm with either hand) uppercut (either hand) Savate did not begin as a sport, but as a form of self-defence and fought on the streets of Paris and Marseille. This type of savate was known as savate de rue. In addition to kicks and punches, training in savate de rue (savate defense) includes knee and elbow strikes along with locks, sweeps, throws, headbutts, and takedowns.[17][18][19][20]

Bartitsu is an eclectic martial art and self-defence method originally developed in England during the years 1898–1902. In 1903, it was immortalised (as "baritsu") by Sir Arthur Conan Doyle, author of the Sherlock Holmes mystery stories.[1] Although dormant throughout most of the 20th century, Bartitsu has been experiencing a revival since 2002. Barton-Wright encouraged members of the Bartitsu Club to study each of the four major hand-to-hand combat styles taught at the Club, each of which broadly corresponded to a different "range" of personal combat.

The following are principles that Lee incorporated into Jeet Kune Do.[6] Lee felt these were universal combat truths that were self-evident, and would lead to combat success if followed. Familiarity with each of the "Four ranges of combat", in particular, is thought to be instrumental in becoming a "total" martial artist. Four ranges of combat Punching Kicking Trapping Grappling Jeet Kune Do students train in each of the aforementioned ranges equally. According to Lee, this range of training serves to differentiate JKD from other martial arts. Lee stated that most but not all traditional martial arts systems specialize in training at one or two ranges. Lee's theories have been especially influential and substantiated in the field of mixed martial arts, as the MMA Phases of Combat are essentially the same concept as the JKD combat ranges. As a historic note, the ranges in JKD have evolved over time. Initially the ranges were categorized as short or close, medium, and long range.[3] These terms proved ambiguous and eventually evolved into their more descriptive forms, although some may still prefer the original three categories.

The Lockdown is a variant of half guard where the defending practitioner further intertwines the legs to achieve a figure four. Using the more extended of their legs, the practitioner traps and drives the foot of the opponent upward; thereby attempting to limit the ability of the opponent to pass to full mount or side control. This position offers a slightly higher likelihood of executing successful sweeps, or reversals, while also offering limited submission options.

Kami shiho gatame (上四方固, "upper four quarter hold down"), and its variations kuzure kami shiho gatame (崩上四方固, "broken upper four quarter hold down"), are the most common pinning holds applied from the north–south position in combat sports using a gi[citation needed]. Kami shiho gatame involves pinning the opponent's arms to his or her side, typically by grabbing the opponent's belt and using the arms to press the arms of the opponent inwards. Kuzure-kami-shiho-gatame is similar, except that one or both arms of the opponent aren't pinned to the side, but can be controlled by for instance pinning them in between an upper arm and a knee.

In shootboxing fighters are awarded points for their success in striking, throwing, and applying standing submission holds to their opponent. They are also given points for four categories of performance: number of times down, amount of damage done to opponent, number of clean hits, and aggressiveness.

Kendo (剣道 kendō?, lit. "sword way") is a modern Japanese martial art, which descended from swordsmanship (kenjutsu) and uses bamboo swords (shinai) and protective armour (bōgu). Today, it is widely practiced within Japan and many other nations across the world. Kendo is an activity that combines martial arts practices and values with strenuous sport-like physical activity. The shinai is meant to represent a Japanese sword (katana) and is made up of four bamboo slats, which are held together by leather fittings. A modern variation of a shinai with carbon fiber reinforced resin slats is also used.[25]

Silambam is a weapon-based Indian martial art from Tamil Nadu, but also traditionally practised by the Tamil community of Sri Lanka and Malaysia. It is closely related to Keralan kalaripayat and Sri Lankan angampora. It derives from the Tamil word silam meaning "hill" and the Kannada word bambu from which the English "bamboo" originates. The term silambambu referred to a particular type of bamboo from the Kurinji hills in present-day Kerala. Thus silambam was named after its primary weapon, the bamboo staff. The related term silambattam often refers specifically to stick-fighting. Beginners are first taught footwork (kaaladi) which they must master before learning spinning techniques and patterns, and methods to change the spins without stopping the motion of the stick. There are sixteen of them among which four are very important. Footwork patterns are the key aspects of silambam. Traditionally, the masters first teach kaaladi for a long time before proceeding to unarmed combat. Training empty-handed allows the practitioner to get a feel of silambam stick movements using their bare hands, that is, fighters have a preliminary training with bare hands before going to the stick. 16 is the number of squares in the quadrant model. There are four very important patterns in the techniques, reflecting the quadrant four.

The sword in ancient Egypt was known by several names, but most are variations of the words sfet, seft or nakhtui. The earliest bronze swords in the country date back 4000 years. Four types of sword are known to have been used: the ma or boomerang-sword based on the hunting stick, the kat or knife-sword, the khopesh or falchion based on the sickle, and a fourth form of straight longsword. Thekhopesh was used region-wide and is depicted as early as the Sixth Dynasty (3000 BC). It was thick-backed and weighted with bronze, sometimes even with gold hilts in the case of pharaohs. The blade may be edged on one or both sides, and was made from iron or blue steel. The double-edge sword had a leaf-shaped blade, and a handle which hollows away at the centre and thickens at each end. These swords are of various lengths, and were paired with shields. Middle Eastern swords became dominant throughout North Africa after the introduction of Islam, after which point swordsmanship in the region becomes that of Arabian or Middle Eastern fencing.

The sword and broadsword are among the four main weapons taught in the Chinese martial arts, the others being the staff and spear. The order in which these weapons is taught may vary between schools and styles, but the jian is generally taught last among the four. The 4 main Chinese Martial Arts weapons taught and used in Wushu in Singapore are 1) The Broad Sword (Dao), 2) The Cudgel (Gun), 3) The Sword (Jian) and lastly 4) The Spear (Qiang). The sequence I have introduced the Wushu weapons also notes its’ level of difficulty, with the Broad Sword being the easiest to learn and master and the Spear being the most intricate.

the Four Poisons of Kumdo" are Surprise, Fear, Doubt (or Hesitation) and Confusion.

For Barrel Racing, Camas Prairie Stump Race courses in horse racing are the shapes of quadrants. A Barrel Racing Course also takes a quadrant formation in which the horse runs.

In Chilean Rodeos the bull can be stopped in four places, and different points are afforded for each place. If the bull is stopped around the head 0 points are given. If it is stopped around the shoulds 2 points. If it is stopped around the waist 3 points. If it is stopped around the rear four points. Rodeo is a traditional sport in Chile. It was declared the national sport in 1962. It has since thrived, especially in the more rural areas of the country. Chilean rodeo is different from the rodeo found in North America. In Chilean rodeo, a team (called a collera) consisting of two riders (called Huasos) and two horses ride laps around an arena trying to stop a calf, pinning it against large cushions. Points are earned for every time the steer is properly driven around the corral, with deductions for faults. Rodeos are conducted in a crescent-shaped corral called a medialuna. The sport, in its modern form, is strictly regulated. Chilean Horses are used exclusively and riders are required to wear traditional huaso garb. Rancagua hosts the annual Campeonato Nacional de Rodeo, the nationwide rodeo championship. The greatest rider in the sport's history is considered Ramón Cardemil, who obtained the national title seven times; the last champions were Juan Carlos Loaiza and Eduardo Tamayo. Riders practice in the countryside throughout Chile, but is most popular in the central zone. Even so, huasos have been known to travel hundreds of miles to compete in competitions. The sport has become so popular that in 2004, more spectators attended rodeo events than professional football matches

Cross country equestrian jumping is an endurance test that forms one of the three phases of the sport of eventing; it may also be a competition in its own right, known as hunter trials or simply "cross-country", although these tend to be lower level, local competitions. The object of the endurance test is to prove the speed, endurance and jumping ability of the true cross-country horse when he is well trained and brought to the peak of condition. At the same time, it demonstrates the rider's knowledge of pace and the use of this horse across country. Historically, the so-called 'long format' endurance test included four phases: Phases A and C, Roads and Tracks; Phase B, the Steeplechase; and Phase D, the Cross-Country. Each phase had to be completed in a set time. Phase A of the roads and tracks was a warming-up period, usually done at a brisk trot, for the purpose of relaxing and loosening up both horse and rider. Phase A led directly to the start for Phase B, the steeplechase. This phase was ridden at a strong gallop to achieve an average speed of 24 miles per hour with six to eight jumps. At the end of the steeplechase, the horse and rider went directly into Phase C, the second roads and tracks. This phase was very important for allowing the horse to relax and recover and to get his wind back to normal. The pace is usually a quiet trot, interspersed with periods of walking and an occasional relaxed canter. Some riders also dismounted and ran next to their horse during this section of the test. The end of Phase C brought the pair to the ten-minute Vet Box prior to starting out on Phase D, the cross-country. Here the horse had a compulsory ten-minute rest allowing a panel of judges and veterinarians to check the horse's temperature, pulse, respiration and soundness. If, in the opinion of the panel, the horse was not fit or sound enough to continue, it was withdrawn from the competition. At this time the horse was sponged down, the tack adjusted and they were prepared for the next phase. Those passing the inspection went to the start box ready for the most exciting phase of the whole endurance test. Disobediences from the horse[edit] First refusal or crossing tracks (circling) in front of an obstacle: 20 penalties per obstacle 2nd refusal or crossed tracks at the same obstacle: 40 additional penalties 3rd refusal or crossed tracks at the same obstacle (an "obstacle" includes all its elements): elimination 4th cumulative refusal or crossed tracks on the entire course: elimination

In horse polo each team consists of four mounted players, which can be mixed teams of both men and women. Each position assigned to a player has certain responsibilities: Number One is the most offence-oriented position on the field. The Number One position generally covers the opposing team's Number Four. Number Two has an important role in offence, either running through and scoring themselves, or passing to the Number One and getting in behind them. Defensively, they will cover the opposing team's Number Three, generally the other team's best player. Given the difficulty of this position, it is not uncommon for the best player on the team to play Number Two so long as another strong player is available to play Three. Number Three is the tactical leader and must be a long powerful hitter to feed balls to Number Two and Number One as well as maintaining a solid defence. The best player on the team is usually the Number Three player, usually wielding the highest handicap. Number Four is the primary defence player. They can move anywhere on the field, but they usually try to prevent scoring. The emphasis on defence by the Number Four allows the Number Three to attempt more offensive plays, since they know that they will be covered if they lose the ball. Polo must be played right-handed.

Pato, also called juego del pato (Spanish pronunciation: [ˈxweɣo ðel ˈpato], literally "duck game"), is a game played on horseback that combines elements from polo and basketball. In modern pato, two four-member teams

The QUADRUPED was an NFL draft day competition held in April 1996 for the Jacksonville Jaguars. This competition format is older than all other disc dog competition formats other than the Ashley Whippet and the FDDO formats. Originally a halftime show for football games with four frisbee dog teams competing to be the last team standing. It turned into an open competition where many more than four teams were able to compete. Today we have The QUADRUPED Series, a group of competitions that are a points championship in the United States. The popularity has been so great within the frisbee dog world that it has spread to Europe where it has occurred in several countries.

All competitions approved by World Minigolfsport Federation are played on standardized courses, whose design has been checked to be suitable for competitive play. The WMF currently approves four different course types: Beton[14] (abbreviated B, sometimes called "Bongni" and named after Paul Bongni of Geneva, Switzerland, "Minigolf" or "Abteilung 1") Eternite[15] (abbreviated E (in Sweden EB), sometimes called "Europabana", "Miniaturgolf" or "Abteilung 2"), Felt[16] (abbreviated F or SFR, sometimes called "Swedish felt runs"), and Minigolf Open System[17] (abbreviated "O", "OS" or "MOS"). The latter non-standardized playing system, MOS, covers all minigolf courses that the three standardized systems (B, E, F) do not cover.

The fountain in juggling is where each hand throws and catches objects and they do not transfer to the opposite hand. This pattern is most commonly used to juggle an even number of objects. In siteswap notation, a four object fountain would be called 4.

Four balls can be juggled. Not really five. Three can be juggled the best. The nature of the quadrant model is the fourth is always different and transcendent.

Gaelic football is one of four sports (collectively referred to as the "Gaelic games") controlled by the Gaelic Athletic Association (GAA), the largest sporting organisation in Ireland Gaelic Games are sports played in Ireland under the auspices of the Gaelic Athletic Association (GAA). Gaelic football and hurling are the two main games. Other games organised by the GAA include Gaelic handball and rounders. Women's versions of hurling and football are also played: camogie, organised by the Camogie Association of Ireland, and ladies' Gaelic football, organised by the Ladies' Gaelic Football Association. While women's versions are not organised by the GAA, they are closely associated with it.[1] Today, Gaelic games are the most popular games in Ireland in terms of supporter attendances at senior games.[2] Despite an economic downturn, attendances in 2009 were up 11% on 2008 Gaelic football[edit] Further information: Gaelic football Gaelic football is played by teams of 15 on a rectangular grass pitch with H-shaped goals at each end. The primary object is to score by driving the ball through the goals, known as a goal or by kicking the ball over the bar, this is known as a point. The team with the highest score at the end of the match wins.[4] The female version of the game is known as ladies' Gaelic football and is very similar to the men's game with a few minor rule changes.[5] Hurling[edit] Further information: Hurling Hurling is a stick and ball game played by teams of 15 on a rectangular grass pitch with H-shaped goals at each end. The primary object is to score by driving the ball through the goals or putting the ball over the bar and thereby scoring a point. Three points is the equivalent of a goal. The team with the highest score at the end of the match wins. It is over three-thousand years old, and is said to be the world's fastest field game, combining skills from lacrosse, field hockey, and baseball in a hard-hitting, highly skilled game.[6] The female version of the game is known as camogie and is very similar to hurling with a few minor rule changes.[7] It was founded in 1832. Gaelic handball[edit] Further information: Gaelic handball Gaelic handball is a game where two players use their hands to return a ball against a wall. The game is similar to American handball. There are three codes of handball; 60x30, 40x20 and One Wall. One Wall handball is the most popular international version of handball with it being played in over 30 countries. It is hoped[by whom?] that this version of handball will soon become an Olympic sport. The sport of handball is governed by GAA Handball in Ireland.[8] Rounders[edit] Further information: Rounders Rounders is a bat and ball game which is played in Ireland; a similar version is played in England. Rounders is the least popular of the GAA Gaelic games and is organised by a sub division of the GAA known as the Rounders Council of Ireland. It is similar to softball.[9]

Four corners is a children's game, often played in elementary schools. The object of the game is for players to choose corners of the room and not get caught by the designated "It" player until they are the last remaining participant.

Competitive trampolining routines consist of combinations of 10 contacts with the trampoline bed combining varying rotations, twists and shapes with take-off and landing in one of four positions: Feet Seat Front Back A routine must always start and finish on feet. In addition to the 10 contacts with the bed in a routine, competitors must start their routine within 60 seconds after presenting to the judges. They are also are permitted up to one "out bounce", a straight jump to control their height at the end of a routine, before sticking the landing. The trampolinist must stop completely - this means that the bed must stop moving as well - and they have to hold still for a count of 3 seconds before moving. In competitions, moves must usually be performed in one of the following 3 basic shapes: Shape Method Tucked with knees clasped to chest by hands Piked with hands touching close to feet and both arms and legs straight Straight body in straight position with legs together, toes pointed, and arms by the sides A fourth 'shape', known as 'puck' because it appears to be a hybrid of pike and tuck, is often used in multiple twisting somersaults - it is typically used in place of a 'tuck' and in competition would normally be judged as an open tuck shape. A straddle, or straddled pike is a variant of a pike with arms and legs spread wide and is only recognised as a move as a shaped jump and not in any somersault moves. The fourth is always different from the previous three but contains elements of them.

Tchoukball /ˈtʃuːkbɔːl/ is an indoor team sport developed in the 1970s by Swiss biologist Hermann Brandt. 2 Right Wings 2 Left Wings 2 Forward Pivots (FP) 1 Centre Pivot (CP)

Steel wolf traps, used frequently in the American west, were made from heavy steel, were six and a half inches wide, and had two springs, each with 100 lbs of power. Steel wolf traps were usually the same models used in the capture of beavers, lynx and wolverine. In order to hide the human scent, trappers would handle their equipment with gloves, and cover the traps in beeswax or blood. As the wolf's power of scent is so great, a mere touch of human skin on the trap will result in the wolf vacating the area. Wolves may also dig up or spring the traps. The traps would typically be set in fours around a bait and strongly fastened to concealed logs, and covered in moss, chaff, cotton or sand for camouflage. Sometimes, the trap and the bait would be placed in a pool of water, thus leaving no other point of access for the wolf to take.

Curling is a sport in which players slide stones on a sheet of ice towards a target area which is segmented into four concentric circles. It is related to bowls, boules and shuffleboard. Two teams, each with four players, take turns sliding heavy, polished granite stones, also called rocks, across the ice curling sheet towards the house, a circular target marked on the ice. Not only are their four concentric circles that the players are aiming four but they are divided into quadrants. Until four stones have been played (two from each side), stones in the free guard zone (those stones left in the area between the hog and tee lines, excluding the house) may not be removed by an opponent's stone (although they can be moved as long as they are not taken out of play). These are known as guard rocks. If the guard rocks are removed, they are replaced to where they were before the shot was thrown, and the opponent's stone is removed from play and cannot be replayed. This rule is known as the four-rock rule or the free guard zone rule (for a while in Canada, a "three-rock rule" was in place, but that rule has been replaced by the four-rock rule). Originally, the Modified Moncton Rule was developed from a suggestion made by Russ Howard for the Moncton 100 cashspiel (with the richest prize ever awarded at the time in a tournament) in Moncton, New Brunswick, in January 1990. "Howard's Rule" (also known as the Moncton Rule), used for the tournament and based on a practice drill his team used, had the first four rocks in play unable to be removed no matter where they were at any time during the end. This method of play altered slightly and adopted as a Four-rock Free Guard Zone for international competition shortly after. Canada kept to the traditional rules until a three-rock Free Guard Zone rule was adopted, starting in the 1993-94 season. After several years of having the three-rock rule used for the Canadian championships and the winners then having to adjust to the four-rock rule in the World Championships, the Canadian Curling Association adopted the now-standard Free Guard Zone in the 2002-2003 season.

Ringette is a team sport with four variations, one winter and three indoor and outdoor versions.

Ice yacht races are usually sailed five times round a triangle of which each leg measures one mile, at least two of the legs being to windward. Ice yachts are divided into four classes, carrying respectively 600 sq ft (60 m2) of canvas or more, between 450 and 600, between 300 and 450, and less than 300 sq ft (30 m2).

In the 1800s, George Pocock used kites of increased size to propel carts on land and ships on the water, using a four-line control system—the same system in common use today. Both carts and boats were able to turn and sail upwind

Four-line (or "quad-line") kites are controlled with a pair of handles, each with two lines attached to the top and bottom and attached to the kite correspondingly. To control the kite, the pilot pulls on the lower line to turn the kite in that direction. Skilled use of these handles allows a quad-line kite to perform in ways that are difficult or impossible with a dual-line kite. Unique quadline maneuvers include reverse flight, axis spins, hovers, and side to side flight. Other aspects of sport kiting include power or traction kites, which can be used to tow wheeled kite buggies (kite buggying) or surfboards (kite surfing). Power kites vary in size from "trainers" which often have dual lines and a small sail area, to large full size traction kites with four lines, designed to pull people on kite boards or vehicles.

Quad-Line Kites[edit]

Quad line kites first hit the kiting scene in 1988 with the invention of the "Neos Omega," later called the "Revolution 1."[3] Quad line kites gained popularity after sport kite team iQuad was formed in 2006.[4] Revolution has dominated the quad-line market, with only a few competing kites from manufacturers like Prism and New Tech Kites. Quad line kites are noticeable by the way that they can hover in space unlike any other sport kite. These kites can be extremely precise.

Adventure racing (also called expedition racing) is typically a multi-disciplinary team sport involving navigation over an unmarked wildnerness course with races extending anywhere from two hours up to two weeks in length. Some races offer solo competition as well. The principle disciplines in adventure racing include trekking, mountain biking, and paddling although races can incorporate a multitude of other disciplines including climbing, abseiling, horse riding, skiing and white water rafting.[1] Teams generally vary in gender mix and in size from two to five competitors, however the premier format is considered to be mixed gender teams of four racers. There is typically no suspension of the clock during races, irrespective of length; elapsed competition time runs concurrently with real time, and competitors must choose if or when to rest.

In 1960-1962 Barry Hill Palmer adapted the flexible wing concept to make foot-launched hang gliders with four different control arrangements.

glider in flight is continuously descending. To achieve an extended flight, the pilot must seek air currents rising faster than the sink rate of the glider. Selecting the sources of rising air currents is the skill that has to be mastered if the pilot wants to achieve flying long distances, known as cross-country (XC). Rising air masses derive from the following sources:[14]

Thermals

The most commonly used source of lift is created by the sun's energy heating the ground which in turn heats the air above it. This warm air rises in columns known as thermals. Soaring pilots quickly become aware of land features which can generate thermals and their trigger points downwind, because thermals have a surface tension with the ground and roll until hitting a trigger point. When the thermal lifts, the first indicator are the swooping birds feeding on the insects being carried aloft, or dust devils or a change in wind direction as the air is pulled in below the thermal. As the thermal climbs, bigger soaring birds indicate the thermal. The thermal rises until it either forms into a cumulus cloud or hits an inversion layer, which is where the surrounding air is becoming warmer with height, and stops the thermal developing into a cloud. Also, nearly every glider contains an instrument known as a variometer (a very sensitive vertical speed indicator) which shows visually (and often audibly) the presence of lift and sink. Having located a thermal, a glider pilot will circle within the area of rising air to gain height. In the case of a cloud street, thermals can line up with the wind, creating rows of thermals and sinking air. A pilot can use a cloud street to fly long straight-line distances by remaining in the row of rising air.

Ridge lift

Ridge lift occurs when the wind encounters a mountain, cliff or hill. The air is pushed up the windward face of the mountain, creating lift. The area of lift extending from the ridge is called the lift band. Providing the air is rising faster than the gliders sink rate, gliders can soar and climb in the rising air by flying within the lift band and at right angle to the ridge. Ridge soaring is also known as slope soaring.

Mountain waves

The third main type of lift used by glider pilots is the lee waves that occur near mountains. The obstruction to the airflow can generate standing waves with alternating areas of lift and sink. The top of each wave peak is often marked by lenticular cloud formations.

Convergence

Another form of lift results from the convergence of air masses, as with a sea-breeze front. More exotic forms of lift are the polar vortices which the Perlan Project hopes to use to soar to great altitudes.[15] A rare phenomenon known as Morning Glory has

Lightweight carts or "trikes" (called "quads" if they have four wheels) can be mounted on powered paragliders for those who prefer not to, or are unable to, foot launch. Some are permanent units.

Biathlon is a winter sport that combines cross-country skiing and rifle shooting. This sport has its origins in an exercise for Norwegian people, as an alternative training for the military. Norwegian skiing regiments organized military skiing contests in the 18th century, divided in four classes: shooting at mark while skiing at top speed, downhill race among trees, downhill race on big hills without falling, and a long race on flat ground while carrying rifle and military pack. The competitions from 1958 to 1965 used high-power centerfire cartridges, such as the .30-06 Springfield and the 7.62×51mm NATO, before the .22 Long Rifle rimfire cartridge was standardized in 1978. The ammunition was carried in a belt worn around the competitor's waist. The sole event was the men's 20 kilometres (12 mi) individual, encompassing four separate ranges and firing distances of 100 metres (330 ft), 150 metres (490 ft), 200 metres (660 ft), and 250 metres (820 ft). The target distance was reduced to 150 metres (490 ft) with the addition of the relay in 1966. The shooting range was further reduced to 50 metres (160 ft) in 1978 with the mechanical targets making their debut at the 1980 Winter Olympics in Lake Placid A biathlon competition consists of a race in which contestants ski around a cross-country trail system, and where the total distance is broken up by either two or four shooting rounds, half in prone position, the other half standing. Depending on the shooting performance, extra distance or time is added to the contestant's total running distance/time. The contestant with the shortest total time wins. The 20 kilometres (12 mi) individual race (15 kilometres (9.3 mi) for women) is the oldest biathlon event; the distance is skied over five laps. The biathlete shoots four times at any shooting lane,[7] in the order of prone, standing, prone, standing, totaling 20 targets. For each missed target a fixed penalty time, usually one minute, is added to the skiing time of the biathlete. Competitors' starts are staggered, normally by 30 seconds. In a pursuit, biathletes' starts are separated by their time differences from a previous race,[8] most commonly a sprint. The contestant crossing the finish line first is the winner. The distance is 12.5 kilometres (7.8 mi) for men and 10 kilometres (6.2 mi) for women, skied over five laps; there are four shooting bouts (two prone, two standing, in that order), and each miss means a penalty loop of 150 metres (490 ft). To prevent awkward and/or dangerous crowding of the skiing loops, and overcapacity at the shooting range, World Cup Pursuits are held with only the 60 top ranking biathletes after the preceding race. The biathletes shoot on a first-come, first-served basis at the lane corresponding to the position they arrived for all shooting bouts. In the mass start, all biathletes start at the same time and the first across the finish line wins. In this 15 kilometres (9.3 mi) for men or 12.5 kilometres (7.8 mi) for women competition, the distance is skied over five laps; there are four bouts of shooting (two prone, two standing, in that order) with the first shooting bout being at the lane corresponding to the competitor's bib number (Bib #10 shoots at lane #10 regardless of position in race), with the rest of the shooting bouts being on a first-come, first-served basis (If a competitor arrives at the lane in fifth place, they shoot at lane 5). As in sprint and pursuit, competitors must ski one 150 metres (490 ft) penalty loop for each miss. Here again, to avoid unwanted congestion, World Cup Mass starts are held with only the 30 top ranking athletes on the start line (half that of the Pursuit as here all contestants start simultaneously). The relay teams consist of four biathletes, who each ski 7.5 kilometres (4.7 mi) (men) or 6 kilometres (3.7 mi) (women), each leg skied over three laps, with two shooting rounds; one prone, one standing. For every round of five targets there are eight bullets available, though the last three can only be single-loaded manually one at a time from spare round holders or bullets deposited by the competitor into trays or onto the mat at the firing line. If after eight bullets there are still misses, one 150 m (490 ft) penalty loop must be taken for each missed target remaining. The first-leg participants start all at the same time, and as in cross-country skiing relays, every athlete of a team must touch the team's next-leg participant to perform a valid changeover. On the first shooting stage of the first leg, the participant must shoot in the lane corresponding to their bib number (Bib #10 shoots at lane #10 regardless of position in race), then for the remainder of the relay, the relay team shoots on a first-come, first-served basis (arrive at the range in fifth place, shoot at lane 5) The most recent addition to the number of biathlon competition variants, the mixed relay is similar to the ordinary relay but the teams are composed of two women and two men. Legs 1 and 2 are done by the women, legs 3 and 4 by the men. The women's legs are 6 kilometres (3.7 mi) and men's legs are 7.5 kilometres (4.7 mi) as in ordinary relay competitions. A team consists of four biathletes, but unlike the relay competition, all team members start at the same time. Two athletes must shoot in the prone shooting round, the other two in the standing round. In case of a miss, the two non-shooting biathletes must ski a penalty loop of 150 m (490 ft). The skiers must enter the shooting area together, and must also finish within 15 seconds of each other; otherwise a time penalty of one minute is added to the total time. Since 2004, this race format has been obsolete at the World Cup level. f

There are four player styles in soccer Goalkeeper[edit] Shot stopper A goalkeeper known as being very good at saving strikes on goal, many at point blank range. They are known for having great reactions, an almost instinctive ability to anticipate where to position themselves and to dive or spread themselves in order to effect a save, often from a shot that may look impossible to prevent going in. They can be recognized by a high saves to shots ratio. Sweeper Keeper With the advent of the offside rule, the role of a sweeping defender or libero has become pretty much obsolete. However, in the last decades it has become popular for goalkeepers to take that role instead. A sweeping goalkeeper is good at reading the game, and prevents scoring opportunities by clearing passes and crosses outside of the goal area without the use of his hands. Defensive[edit] Attacking full-back An attacking full-back (or wing-back) is a defender stationed on the flank with emphasis on attack as well as defense. The name wing-back is a portmanteau of "winger" (see above) and "full-back". As the role combines that of the winger and the full-back, attacking full-backs need to be blessed with good stamina. Where a teams fields three centre-backs, the attacking full-back is expected to concentrate more on providing support for strikers than concentrating on their defensive duties.[63] Libero The libero (Italian: free) or sweeper is a more versatile type of defender that "sweeps up" the ball if the opponent manages to break the defensive line. Their position is rather more fluid than other defenders who mark their designated opponents.[41] Sweepers are usually faster than that of the other players on the team, and are built slightly smaller than the others. The sweeper's ability to read the game is even more vital than for a centre-back; they also are usually confident on the ball and possess good passing and vision, as they are often responsible for starting plays from the back-line.[19] The catenaccio system of play, used in Italian football in the 1960s, notably employed a defensive libero.[20] Stopper Stoppers are skilled defenders who rely on their strength, stamina and man marking abilities to be able to stop the opposition's attacking play by making strong tackles. They are usually uncompromising in their tackling and would rather give away a foul than let an opposition player get past them with the ball. Stoppers usually play as centre-backs or could be a defensive midfielder playing in front of the defence. Midfield[edit] Ball winner A ball winner is a player skilled at winning the ball back from the opposition through tackling and interceptions in the midfield area of the pitch. They endeavour to break up the opposition's attacking play by regaining possession. Ball winners are usually defensive midfielders or central midfielders but this can also be an attribute of a defender. Defensive midfielder Defensive midfielders are central midfield players that focus more on defence than attack. They need strength to make strong tackles and they also need stamina and some degree of passing skill as they need to support other midfielders. Creative midfielder Creative midfielders are midfield players that are able to create goal scoring opportunities for the team often in situations where nothing seems likely. They usually have good ball control, passing ability and movement and will be blessed with vision and on-the-ball intelligence. They are usually attacking midfielders, though second strikers, wingers and central midfielders can also be known as creative players. Box to box Box to box midfielders help with almost every aspect of the game. They need immense stamina as they need to cover most areas of the pitch, as well as some degree of passing skills. They would be up one end of the pitch assisting the attack one moment then back helping to defend around their own penalty area the next. They normally play as central midfielders but any of the midfield players may have this attribute. Pulls wide right/left These are wide midfielders that have pace and/or dribbling ability to be able to beat defenders along the flank. They will have the habit of running wide whenever they get possession of the ball or when their team is attacking, to receive the ball. Their most important skill is to be able to cross the ball into the penalty box to create opportunities for strikers. Sometimes strikers will pull right or left as a tactic to draw a defender out of position or to get into unmarked space. Playmaker Playmakers are midfielders that controls the flow of attacking play, starting off attacking moves. They have good passing ability and also good off-the-ball ability and vision to be able to read the game and to see where goal-scoring opportunities may come from. Playmakers usually play as central midfielders or attacking midfielders, but some play as defensive midfielders (known as deep-lying playmakers). Midfield general A central midfield player who absolutely controls the midfield area, directing team play and breaking up the opponent's attacks. They are known for having the biggest influence on their team's overall performances, driving them forward to attack, putting sustained pressure on the opposition and leading by example when the team is defending. They more often than not will be the team captain. Attacking[edit] Dribbler Dribblers are players known for their close ball control ability that is used to go past defenders by sudden change of direction and acceleration sometimes combined with great pace. The skill is used to create opportunities for other attackers or to score themselves having broken through the opposition's defence using what is sometimes referred to as "trickery". One of the great spectator sights in football is a player going on a "mazy run" with the ball, twisting and turning to avoid opposition tackles, beating a number of players. They usually play as wingers, secondary strikers or attacking midfielders, but in some cases, a centre forward may also have these skills. Counter attacker Counter attackers are any attacking player that uses their pace to beat defenders and cause unexpected scoring opportunities at any time. They also need some degree of shooting skill. Counter attacking opportunities occur when the opposition are themselves attacking a team with most of their players forward. A counterattack happens when the ball is won back and is quickly played into space for a counterattacking player to run onto or where a player takes the ball themselves and runs with pace into a sparsely defended opposition half. Clinical finisher Clinical finishers are forwards that specialise in their accurate shooting ability. They are "clinical" in that they need few opportunities to score a goal being able to strike and place the ball exactly where it will beat the goalkeeper. They can be identified by their high goal to shots ratio. Clinical strikers usually play as centre forwards though other attacking players can often be said to be clinical finishers. Target man Target men are forwards that generally have a high degree of physical strength and are usually tall in height. They are able to make space, score goals, or hold up play with the ball waiting for support no matter how much pressure defenders are putting on them. They specialise in taking and controlling the ball in the air or along the ground often from long passes, strength to hold off defenders when receiving long passes and sometimes volleying the ball. The term "target" refers to the fact that other team players will use them to play long balls or crosses to even though they may be surrounded by opposition defenders. The role is unique to centre forwards. Goal poacher Goal poachers are forwards who wait in the six-yard box or the penalty area for a cross, pass or loose ball and pounce to try to score a goal. Their "poaching" refers to the fact that they will often score a goal out of the slightest of opportunities i.e. steal a goal. Goal poachers usually play as centre forwards or second strikers. False nine A false nine is a player who appears to be playing as a centre-forward (traditionally a number nine shirt), but drops deeps or pulls wide disrupting the opposing team's marking. Usually the centre forward will be marked by one of the centre-backs but the false nine will often move away into a grey area causing a dilemma on whether the centre-back follows, isolating them from the other centre-back or stays where they are, making themselves redundant.

Flat back four In 1958, the Brazil national team won their first of five World Cups to date thanks to the "flat back four" system they had developed to counter the Hungarians' M–U. Two centre-backs would mark the inside-forwards' runs from deep, while the wider full-backs would not only cut out the threat of the opposing wingers but also provide width on the counter-attack. The relative lack of numbers in the middle of the park meant a creative presence was required, and for the Brazilians, that presence was provided in the form of their dazzling midfielder Didi. Also in Mario Zagallo they had a left winger years ahead of his time, proficient at funnelling back and helping out the midfield when the team lost possession.

The 2010 World Cup confirmed a general shift toward a broadly counter-attacking, reactive 4–2–3–1 formation by the tournament's more successful teams.[64] Indeed, of the four semi-finalists in that tournament, all but Uruguay employed some variation of this tactic. This shape tends to utilise fluid movement between the four wing players, with full-backs expected to provide plenty of support to the wingers in front of them. Following the World Cup, most of the world's major leagues[clarification needed] have seen this tactic being used by an increasing number of teams

In rugby union, World Rugby regulates the size and shape of the ball under Law 2 (also known as Law E.R.B); an official rugby union ball is oval and made of four panels

The posture of zazen is seated, with folded legs and hands, and an erect but settled spine.[9] The hands are folded together into a simple mudra over the belly.[9] In many practices, the practitioner breathes from the hara (the center of gravity in the belly) and the eyelids are half-lowered, the eyes being neither fully open nor shut so that the practitioner is neither distracted by, nor turning away from, external stimuli. The legs are folded in one of the four standard sitting styles Kekkafuza (full-lotus) Hankafuza (half-lotus) Burmese (a cross-legged posture in which the ankles are placed together in front of the sitter) Seiza (a kneeling posture using a bench or zafu)

Today there are four major branches of BJJ from Brazil: Gracie Humaita, Gracie Barra, Carlson Gracie Jiu-Jitsu and Alliance Jiu Jitsu. Each branch can trace its roots back to Mitsuyo Maeda via the Gracie family or Oswaldo Fadda.

Pinning holds in budō from the mount include tate shiho gatame (縦四方固, "horizontal four quarters hold", also called hon-tate-shiho-gatame,[1] 本縦四方固), which is similar to kata-gatame except that it is performed from the mount. The opponent's arm is pinned against his or her neck, and the head and arm are held tightly. This may result in a potent arm triangle choke. In its variations kuzure-tate-shiho-gatame (崩縦四方固, "modified horizontal four quarters hold"), the arm is not held against the neck, but rather, one of the arms may be held. The stability of these pinning holds or the mount in general, can be increased by entangling the opponents legs with the own legs, a technique known as grapevining.

A figure-four is a grappling joint-lock that resembles the number "4". A keylock or toe hold can be referred to as a figure-four hold, when it involves a figure-four formation with the legs or arms. If the figure-four involves grabbing the wrists with both hands, it is sometimes called a double wrist lock. A figure-four hold done with the legs around the neck and (usually) arm of an opponent is often called a triangle choke, and is a common submission in mixed martial arts and Brazilian jiu jitsu. Prior to this, this form was in Japanese martial arts, where it is known as Sankaku-Jime. The wrestling move figure 4 leg lock was made famous by WWE Hall of Famer Ric "The Nature Boy" Flair.

A Nelson Hold (aka Elfakhani Hold) is a grappling hold which is executed from behind the opponent, generally when both are on the mat face down with the opponent under the aggressor. One or both arms are used to encircle the opponent's arm under the armpit, and secured at the opponent's neck. Several different nelson holds exist, and they can be separated according to the positioning of the encircling arm(s). A nelson is used to control an opponent or to turn him over on his back and execute a pin. The term "nelson" is derived from "full nelson", which dates back to the early 19th century. It has been suggested that it was named after the British war-hero Admiral Horatio Nelson, who used strategies based on surrounding the opponent to win the Battle of the Nile and the Battle of Trafalgar, but its true origin remains uncertain.[ Quarter nelson[edit] The quarter nelson involves putting one hand on the opponent's neck, passing the free arm under the arm of the opponent, and locking the free arm to the other arm by clasping the wrist. In amateur wrestling a strong quarter nelson can be used to secure a pin, or to control the opponent and advance into a more dominant position. Half nelson[edit] Half nelson. Power half nelson. The half nelson is referred to by most coaches as being the easiest, but most effective move in folkstyle wrestling, and is very commonly used. The half nelson is done using only one hand, by passing it under the arm of the opponent and locking the hand on the opponent's neck. In addition, the hand not being used should be holding the opponent's other wrist in so that they can not post the hand or peel the half nelson off. A power half nelson is a type of half nelson. The hand not performing the nelson is placed on the opponent's head to increase the overall power of the half nelson. When the half nelson has been put into place, it is used to turn the opponent over onto his back. This is accomplished by using the hand to press the opponent's neck down, while using the arm under the opponent's shoulder to lift the shoulder and drive it perpendicularly to the opponent's body. When the opponent has been turned over onto his back, the aggressor attempts to pin him by tightening the grip on the neck, putting the nelson in more deeply so that the aggressor's elbow is hooking the opponent's neck. Often the aggressor remains perpendicular to the opponent, chest on chest. The aggressor's free hand is used to minimize struggling by hooking the opponent's near or far leg or crotch. Countering the half nelson[edit] When the aggressor is in the process of putting the half nelson in, the opponent can attempt to prevent it from going in deeply by using his affected arm to clamp down on the intruding arm. This is especially effective if the opponent is on his knees instead of lying flat, which is why the half nelson should not be attempted until the opponent's stomach is on the ground. When the aggressor is driving forward perpendicularly to the opponent's body, the opponent can try to avoid being flipped over onto his back by extending his opposite foot in the direction of the undesired movement, and planting it. Once the opponent is on his back, he can attempt to avoid having his shoulders pinned to the mat, and to get off his back, by planting his feet and pushing the mat with them, allowing him to roll his head back so the top of his head is on the mat, rather than the back of his neck being on the aggressor's arm. From this position he can try to turn over either toward or away from the aggressor. Three-quarter nelson[edit] The three-quarter nelson is done by performing a half nelson using one hand, and passing the other hand underneath the opponent from the same side. The passing hand goes under the opponent's neck and around the far side to the top of the neck, where it is locked with the other hand around the neck at the wrist or using a palm-to-palm or interlacing fingers grip. The three-quarter nelson can be used in amateur wrestling to pin the opponent, and is more secure than a half-nelson. Full nelson[edit] Full nelson. The full nelson (sometimes called a double nelson or a double shoulder lock) is done by performing half nelsons with both arms. In collegiate, high school, middle school/junior high school, and most other forms of amateur wrestling, the move is illegal. The holder is on the back side of the opponent, and has his or her hands extended upwards under the opponents armpits, holding the neck with a palm-to-palm grip or with interlaced fingers. By cranking the hands forward, pressure can be applied to the neck of the opponent. The usage of the full nelson in combat sports is very limited. It is a secure hold which can be used to control the opponent, but does not allow for finishing action, such as pinning the opponent, executing a reliable submission hold, or allowing for effective striking.[2] Because it can be used as a limited neck crank, it is considered dangerous in some grappling arts, and is banned, for instance, in amateur wrestling.

Crucifix neck crank[edit] The crucifix neck crank is similar to the cattle catch, but involves the combatant performing the neck crank being mounted on the opponent. Both of the opponent's arms are controlled, and the opponent's head is held in the armpit. By cranking the body upwards while keeping a tight hold on the opponents arms, the opponents head is forced towards his or her chest. Both the cattle catch and the crucifix neck crank are colloquially referred to simply as the crucifix, which often leads to confusion with the traditional crucifix position.

The Crucifix position, also known as the Salaverry, is a ground grappling position that involves being perpendicularly behind the opponent, chest against back, and controlling the opponent's arms. One of the opponent's arms is controlled using the legs, and the other using the arms, hence effectively putting the opponent in a position resembling a crucifix. This position allows for elbow strikes to the head, or if the opponent is wearing a gi, it allows for a collar strangle called the crucifix choke (in Judo known as jigoku jime, 地獄絞, "hell strangle").[1] It is also possible to have the crucifix position in such a way that a crucifix neck crank can be applied.

In march madness there is the sweet 16 elite eight final four and championship. There are 16 squares in the quadrant model and four quadrants with four squares in each. Each level of march madness denotes a transision in the wuadrant model. The first 8 squares (two quadrants) are conservative and the last eight are destructive. The first two are conservatibe the last two are destructive in each quadrant

There are four basic punches in boxing: the jab, cross, hook and uppercut. Any punch other than a jab is considered a power punch. If a boxer is right-handed (orthodox), his left hand is the lead hand and his right hand is the rear hand. For a left-handed boxer or southpaw, the hand positions are reversed. For clarity, the following discussion will assume a right-handed boxer. Jab – A quick, straight punch thrown with the lead hand from the guard position. The jab is accompanied by a small, clockwise rotation of the torso and hips, while the fist rotates 90 degrees, becoming horizontal upon impact. As the punch reaches full extension, the lead shoulder can be brought up to guard the chin. The rear hand remains next to the face to guard the jaw. After making contact with the target, the lead hand is retracted quickly to resume a guard position in front of the face. The jab is recognized as the most important punch in a boxer's arsenal because it provides a fair amount of its own cover and it leaves the least amount of space for a counter punch from the opponent. It has the longest reach of any punch and does not require commitment or large weight transfers. Due to its relatively weak power, the jab is often used as a tool to gauge distances, probe an opponent's defenses, harass an opponent, and set up heavier, more powerful punches. A half-step may be added, moving the entire body into the punch, for additional power. Some notable boxers who have been able to develop relative power in their jabs and use it to punish or 'wear down' their opponents to some effect include Larry Holmes and Wladimir Klitschko. Cross – A powerful, straight punch thrown with the rear hand. From the guard position, the rear hand is thrown from the chin, crossing the body and traveling towards the target in a straight line. The rear shoulder is thrust forward and finishes just touching the outside of the chin. At the same time, the lead hand is retracted and tucked against the face to protect the inside of the chin. For additional power, the torso and hips are rotated counter-clockwise as the cross is thrown. A measure of an ideally extended cross is that the shoulder of the striking arm, the knee of the front leg and the ball of the front foot are on the same vertical plane.[40] Weight is also transferred from the rear foot to the lead foot, resulting in the rear heel turning outwards as it acts as a fulcrum for the transfer of weight. Body rotation and the sudden weight transfer is what gives the cross its power. Like the jab, a half-step forward may be added. After the cross is thrown, the hand is retracted quickly and the guard position resumed. It can be used to counter punch a jab, aiming for the opponent's head (or a counter to a cross aimed at the body) or to set up a hook. The cross is also called a "straight" or "right", especially if it does not cross the opponent's outstretched jab. Hook – A semi-circular punch thrown with the lead hand to the side of the opponent's head. From the guard position, the elbow is drawn back with a horizontal fist (knuckles pointing forward) and the elbow bent. The rear hand is tucked firmly against the jaw to protect the chin. The torso and hips are rotated clockwise, propelling the fist through a tight, clockwise arc across the front of the body and connecting with the target. At the same time, the lead foot pivots clockwise, turning the left heel outwards. Upon contact, the hook's circular path ends abruptly and the lead hand is pulled quickly back into the guard position. A hook may also target the lower body and this technique is sometimes called the "rip" to distinguish it from the conventional hook to the head. The hook may also be thrown with the rear hand. Notable left hookers include Joe Frazier , Roy Jones Jr. and Mike Tyson. Ricardo Dominguez (left) throws an uppercut on Rafael Ortiz (right).[41] Uppercut – A vertical, rising punch thrown with the rear hand. From the guard position, the torso shifts slightly to the right, the rear hand drops below the level of the opponent's chest and the knees are bent slightly. From this position, the rear hand is thrust upwards in a rising arc towards the opponent's chin or torso. At the same time, the knees push upwards quickly and the torso and hips rotate anti-clockwise and the rear heel turns outward, mimicking the body movement of the cross. The strategic utility of the uppercut depends on its ability to "lift" the opponent's body, setting it off-balance for successive attacks. The right uppercut followed by a left hook is a deadly combination employing the uppercut to lift the opponent's chin into a vulnerable position, then the hook to knock the opponent out.

In tennis the scoring system reflects the quadrant model pattern. It goes 15, 30, 40, game. The final score is transcendent

Among coaches, single-wing football denotes a formation using a long snap from center as well as a deceptive scheme that evolved from Glenn "Pop" Warner's offensive style. Traditionally, the single-wing was an offensive formation that featured a core of four backs including a tailback, a fullback, a quarterback (blocking back), and a wingback.

The team in possession of the football has a limited number of downs (four downs in American football)

Offensive positions[edit] Up to four players can be behind the line of scrimmage, but one is always designated the quarterback (defined as the player who receives the ball from the center). Upon the snap of the ball, the quarterback becomes the ball carrier. The three other backs can be halfbacks, (who primarily carry the ball), fullbacks, (who primarily block), or they can play near (but not on) the line of scrimmage to act as extra tight ends or wide receivers. A tight end that fills the role as the 4th back is often called an "H-Back" and a wide receiver that fills that role is sometimes known as a "flanker" or a "slot" receiver (depending on where he lines up). Most formations have a "strong" side (the side with the tight end, or the side with more players) and a "weak side" (the side opposite the tight end, or the side with fewer players).

In American football, a 4–3 defense is a defensive alignment consisting of four down linemen and three linebackers. It is probably the most commonly used defense in modern American football and especially in the National Football League

NFL teams that use the 4–3 defense as of 2014 include the Dallas Cowboys, Atlanta Falcons, Oakland Raiders, Minnesota Vikings, Carolina Panthers, Cincinnati Bengals, Jacksonville Jaguars, St. Louis Rams, Detroit Lions, New England Patriots, Tampa Bay Buccaneers, Seattle Seahawks, Miami Dolphins, Buffalo Bills, New Orleans Saints, and the New York Giants. The Patriots returned to the 4–3 in the 2011 NFL Season. The Bills began using a 4-3 since 2014 and will stick with the 4-3 under defense with the hiring of new head coach Rex Ryan. The New York Jets used variations of the 4–3 for the 2012 NFL season against spread offenses, but will stick with the 3-4 defense as its base. The Falcons returned to a 4–3 defense after a year of failed experience with a 3–4 defense, and DC Mike Nolan and HC Mike Smith were let go.

The offense may put one of the 4 backfield players in motion after the set but before the snap. The motion must be either parallel to or (if in the backfield) away from the line of scrimmage at the snap

There are four downs in football

Stance is the position an American football player adopts when a play begins. There are three common stances used by linemen: two-point, three-point, and four-point. The stance names reference the number of points where a player's body is touching the ground while down in the stance.

Relay races are the only track and field event in which a team of runners directly compete against other teams.[46] Typically, a team is made up of four runners of the same sex. Each runner completes their specified distance (referred to as a leg) before handing over a baton to a team mate, who then begins their leg upon receiving the baton. There is usually a designated area where athletes must exchange the baton. Teams may be disqualified if they fail to complete the change within the area, or if the baton is dropped during the race. A team may also be disqualified if its runners are deemed to have wilfully impeded other competitors. Girls handing over the baton in a relay race in Leipzig in 1950 Relay races emerged in the United States in the 1880s as a variation on charity races between firemen, who would hand a red pennant on to team mates every 300 yards. There are two very common relay events: the 4×100 metres relay and the 4×400 metres relay. Both events entered the Olympic programme at the 1912 Summer Games after a one-off men's medley relay featured in 1908 Olympics.[47] The 4×100 m event is run strictly within the same lane on the track, meaning that the team collectively runs one complete circuit of the track. Teams in a 4×400 m event remain in their own lane until the runner of the second leg passes the first bend, at which point runners can leave their lanes and head towards the inner-most part of the circuit. For the second and third baton change overs, team mates must align themselves in respect of their team position – leading teams take the inner lanes while team mates of the slower teams must await the baton on outer lanes.[46][48] The IAAF keeps world records for five different types of track relays. As with 4×100 m and 4×400 m events, all races comprise teams of four athletes running the same distances, with the less commonly contested distances being the 4×200 m, 4×800 m and 4×1500 m relays.[49] Other events include the distance medley relay (comprising legs of 1200 m, 400 m, 800 m, and 1600 m), which is frequently held in the United States, and a sprint relay, known as the Swedish medley relay, which is popular in Scandinavia and held at the World Youth Championships in Athletics programme.[50] Relay events have significant participation in the United States, where a number of large meetings (or relay carnivals) are focused almost exclusively on relay events.[51]

Vertical jumps (High Jump and Pole Vault) set a bar at a particular height. The competitor must clear the bar without knocking it off the standards that are holding the bar (flat). Three failures in a row ends the competitor's participation in the event. The competitor has the option to PASS their attempt, which can be used to strategic advantage (of course that advantage is lost if the competitor misses). A pass could be used to save energy and avoid taking a jump that would not improve their position in the standings. After all competitors have either cleared, passed or failed their attempts at a height, the bar goes up. The amount the bar goes up is predetermined before the competition, though when one competitor remains, that competitor may choose their own heights for the remaining attempts. A record is kept of each attempt by each competitor. After all competitors have taken their attempts, the one jumping the highest is the winner, and so on down the other competitors in the event. Ties are broken by first, the number of attempts taken at the highest height (fewest wins), and then if still tied, by the total number of misses in the competition as a whole. The bar does not go back to a lower height except to break a tie for first place or a qualifying position. If those critical positions are still tied after applying the tiebreakers, all tied competitors take a fourth jump at the last height. If they still miss, the bar goes down one increment where they again jump. This process continues until the tie is broken.

Track and field contains some of the foremost kinds of throwing sports, and the four major disciplines are the only pure throwing events to feature at the Olympic Games.[75] Shot put[edit] Remigius Machura preparing to throw within the circle Main article: Shot put The genesis of the shot put can be traced to pre-historic competitions with rocks:[76] in the Middle ages the stone put was known in Scotland and the steinstossen was recorded in Switzerland. In the 17th century, cannonball throwing competitions within the English military provided a precursor to the modern sport.[77][78] The modern rules were first laid out in 1860 and required that competitors take legal throws within a square throwing area of seven feet (2.13 m) on each side. This was amended to a circle area with a seven-foot diameter in 1906, and the weight of the shot was standardised to 16 pounds (7.26 kg). Throwing technique was also refined over this period, with bent arm throws being banned as they were deemed too dangerous and the side-step and throw technique arising in the United States in 1876.[77] The shot put has been an Olympic sport for men since 1896 and a women's competition using a 4 kg (8.82 lb) shot was added in 1948. Further throwing techniques have arisen since the post-war era: in the 1950s Parry O'Brien popularised the 180 degree turn and throw technique commonly known as the "glide", breaking the world record 17 times along the way, while Aleksandr Baryshnikov and Brian Oldfield introduced the "spin" or rotational technique in 1976.[77][79] Discus throw[edit] Zoltán Kővágó preparing to spin and throw the discus Main article: Discus throw As one of the events within the ancient pentathlon, the history of the discus throw dates back to 708 BC.[80] In ancient times a heavy circular disc was thrown from a set standing position on a small pedestal, and it was this style that was revived for the 1896 Olympics.[81] This continued until the 1906 Intercalated Games in Athens, which featured both the ancient style and the increasingly popular modern style of turning and throwing. By the 1912 Olympics, the ancient standing throw style had fallen into disuse and contests starting within a 2.5 m squared throwing area became the standard.[82] The discus implement was standardised to 2 kg (4.4 pounds) in weight and 22 cm (8 inches) in diameter in 1907.[81] The women's discus was among the first women's events on the Olympic programme, being introduced in 1928.[83] Javelin throw[edit] Bregje Crolla beginning to throw the javelin Main article: Javelin throw As an implement of war and hunting, javelin throwing began in prehistoric times.[84] Along with the discus, the javelin was the second throwing event in the ancient Olympic pentathlon. Records from 708 BC show two javelin competition types co-existing: throwing at a target and throwing the javelin for distance. It was the latter type from which the modern event derives.[85] In ancient competitions, athletes would wrap an ankyle (thin leather strip) around the javelin that acted as a sling to facilitate extra distance.[86] The javelin throw gained much popularity in Scandinavia in the late 18th century and athletes from the region are still among the most dominant throwers in men's competitions.[85] The modern event features a short run up on a track and then the thrower releases the javelin before the foul line. The first Olympic men's javelin throw contest was held in 1908 and a women's competition was introduced in 1932.[84][87] The first javelins were made of various types of wood, but in the 1950s, former athlete Bud Held introduced a hollow javelin, then a metal javelin, both of which increased throwers performances.[85] Another former athlete, Miklós Németh invented the rough-tailed javelin and throws reached in excess of 100 m – edging towards the limits of stadia.[88] The distances and the increasing number of horizontal landings led the IAAF to redesign the men's javelin to reduce distance and increase the implement's downward pitching moment to allow for easier measurement. Rough-tailed designs were banned in 1991 and all marks achieved with such javelins were removed from the record books. The women's javelin underwent a similar redesign in 1999.[85] The current javelin specifications are 2.6 to 2.7 m in length and 800 grams in weight for men, and between 2.2 to 2.3 m and 600 g for women.[89] Hammer throw[edit] Yury Shayunou spinning with the hammer within the circle Main article: Hammer throw The earliest recorded precursors to the modern hammer throw stem from the Tailteann Games around 1800 BC, which featured events such as throwing either a weight attached to a rope, a large rock on a wooden handle, or even a chariot wheel on a wooden axle.[90] Other ancient competitions included throwing a cast iron ball attached to a wooden handle – the root of the term "hammer throw" due to their resemblance to the tools.[91] In 16th century England, contests involving the throwing of actual blacksmith's Sledgehammers were recorded.[90] The hammer implement was standardised in 1887 and the competitions began to resemble the modern event. The weight of the metal ball was set at 16 pounds (7.26 kg) while the attached wire had to measure between 1.175 m and 1.215 m.[91] The men's hammer throw became an Olympic event in 1900 but the women's event – using a 4 kg (8.82 lb) weight – was not widely competed until much later, finally featuring on the women's Olympic programme a century later.[92] The distances thrown by male athletes became greater from the 1950s onwards as a result of improved equipment using the denser metals, a switch to concrete throwing areas, and more advanced training techniques.[93] Professional hammer throwers as historically large, strong, sturdy athletes. However, qualities such as refined technique, speed and flexibility have become increasingly important in the modern era as the legal throwing area has been reduced from 90 to 34.92 degrees and throwing technique involves three to four controlled rotations.[

There are four jumping events in track Long jump Naide Gomes in the jumping phase of the event Main article: Long jump The long jump is one of the oldest track and field events, having its roots as one of the events within the ancient Greek pentathlon contest. The athletes would take a short run up and jump into an area of dug up earth, with the winner being the one who jumped farthest.[57] Small weights (Halteres) were held in each hand during the jump then swung back and dropped near the end to gain extra momentum and distance.[58] The modern long jump, standardised in England and the United States around 1860, bears resemblance to the ancient event although no weights are used. Athletes sprint along a length of track that leads to a jumping board and a sandpit.[59] The athletes must jump before a marked line and their achieved distance is measured from the nearest point of sand disturbed by the athlete's body.[60] The athletics competition at the first Olympics featured a men's long jump competition and a women's competition was introduced at the 1948 Summer Olympics.[59] Professional long jumpers typically have strong acceleration and sprinting abilities. However, athletes must also have a consistent stride to allow them to take off near the board while still maintaining their maximum speed.[60][61] In addition to the traditional long jump, a standing long jump contest exists which requires that athletes leap from a static position without a run-up. A men's version of this event featured on the Olympic programme from 1900 to 1912.[62] Triple jump[edit] Main article: Triple jump Similar to the long jump, the triple jump takes place on a track heading towards a sandpit. Originally, athletes would hop on the same leg twice before jumping into the pit, but this was changed to the current "hop, step and jump" pattern from 1900 onwards.[63] There is some dispute over whether the triple jump was contested in ancient Greece: while some historians claim that a contest of three jumps occurred at Ancient Games,[63] others such as Stephen G. Miller believe this is incorrect, suggesting that the belief stems from a mythologised account of Phayllus of Croton having jumped 55 ancient feet (around 16.3 m).[58][64] The Book of Leinster, a 12th-century Irish manuscript, records the existence of geal-ruith (triple jump) contests at the ancient Tailteann Games.[65] Phillips Idowu in the phases of the triple jump The men's triple jump competition has been ever-present at the modern Olympics, but it was not until 1993 that a women's version gained World Championship status and went on to have its first Olympic appearance three years later.[63] A men's standing triple jump event featured at the 1900 and 1904 Olympics but such competitions have since become very uncommon, although it is still used as a non-competitive exercise drill.[66] High jump[edit] Main article: High jump The first recorded instances of high jumping competitions were in Scotland in the 19th century.[67] Further competitions were organised in 1840 in England and in 1865 the basic rules of the modern event were standardised there.[68] Athletes have a short run up and then take off from one foot to jump over a horizontal bar and fall back onto a cushioned landing area.[69] The men's high jump was included in the 1896 Olympics and a women's competition followed in 1928. Jumping technique has played a significant part in the history of the event. High jumpers typically cleared the bar feet first in the late 19th century, using either the Scissors, Eastern cut-off or Western roll technique. The straddle technique became prominent in the mid-20th century, but Dick Fosbury overturned tradition by pioneering a backwards and head-first technique in the late 1960s – the Fosbury Flop – which won him the gold at the 1968 Olympics. This technique has become the overwhelming standard for the sport from the 1980s onwards.[68][70] The standing high jump was contested at the Olympics from 1900 to 1912, but is now relatively uncommon outside of its use as an exercise drill. Pole vault[edit] Anna Giordano Bruno releases the pole after clearing the bar Main article: Pole vault In terms of sport, the use of poles for vaulting distances was recorded in Fierljeppen contests in the Frisian area of Europe, and vaulting for height was seen at gymnastics competitions in Germany in the 1770s.[71] One of the earliest recorded pole vault competitions was in Cumbria, England in 1843.[72] The basic rules and technique of the event originated in the United States. The rules required that athletes do not move their hands along the pole and athletes began clearing the bar with their feet first and twisting so that the stomach faces the bar. Bamboo poles were introduced in the 20th century and a metal box in the runway for planting the pole became standard. Landing mattresses were introduced in the mid-20th century to protect the athletes who were clearing increasingly greater heights.[71] The modern event sees athletes run down a strip of track, plant the pole in the metal box, and vault over the horizontal bar before letting go of the pole and falling backwards onto the landing mattress.[73] While earlier versions used wooden, metal or bamboo, modern poles are generally made from artificial materials such as fibreglass or carbon fibre.[74] The pole vault has been an Olympic event since 1896 for men, but it was over 100 years later that the first women's world championship competition was held at the 1997 IAAF World Indoor Championships. The first women's Olympic pole vaulting competition occurred in 2000.

In Track there are four sprint races Common contemporary distances[edit] 60 m[edit] The 60 metres is normally run indoors, on a straight section of an indoor athletic track. Since races at this distance can last around six or seven seconds, having good reflexes and thus getting off to a quick start is more vital in this race than any other. This is roughly the distance required for a human to reach maximum speed and can be run with one breath. It is popular for training and testing in other sports (e.g., speed testing for American football, although 40 yards is more common there). The world record in this event is held by American sprinter Maurice Greene with a time of 6.39 seconds. 60-metres is used as an outdoor distance by younger athletes when starting sprint racing. Note: Indoor distances are less standardized as many facilities run shorter or occasionally longer distances depending on available space. 60m is the championship distance. 100 m[edit] Tyson Gay completes a 100m race The 100 metres sprint takes place on one length of the home straight of a standard outdoor 400 m track. Often, the world-record holder in this race is considered "the world's fastest man/woman." The current world record of 9.58 seconds is held by Usain Bolt of Jamaica and was set on 16 August 2009, at the 2009 World Athletics Championships. The women's world record is 10.49 seconds and was set by Florence Griffith-Joyner. World class male sprinters (sub 10.10s) need 41 to 50 strides to cover the whole 100 metres distances.[10] 200 m[edit] The 200 metres begins on the curve of a standard track (where the runners are staggered in their starting position, to ensure that they all run the same distance), and ends on the home straight. The ability to "run a good bend" is key at the distance, as a well conditioned runner will typically be able to run 200 m in an average speed higher than their 100 m speed. Usain Bolt, however, ran 200 m in the world-record time of 19.19 sec, an average speed of 10.422 m/s, whereas he ran 100 m in the world-record time of 9.58 sec, an average speed of 10.438 m/s. Indoors, the race is run as one lap of the track, with only slightly slower times than outdoors. A slightly shorter race (but run on a straight track), the stadion, was the first recorded event at the ancient Olympic Games and the oldest known formal sports event in history. A 200 m bend The world record in this event is 19.19 seconds, held by Usain Bolt and was set on 20 August 2009, at the 2009 World Athletics Championships. 400 m[edit] The 400 metres is one lap around the track on the inside lane. Runners are staggered in their starting positions to ensure that everyone runs the same distance. While this event is classified as a sprint, there is more scope to use tactics in the race; the fact that 400 m times are considerably more than four times a typical 100 m time demonstrates this. The world record is currently held by Michael Johnson with a time of 43.18 seconds. The fourth is always different.

In track the hammer throw has three to four rotations.

There are four hurdle events in the olympics. They are 60 m hurdles 100 m hurdles 110 m hurdles 400 m hurdles Again notice how the fourth is a lot different from the previous three.

Modern darts have four parts: The points, the barrels, the shafts and the fletching

Among the wide variety of pitches that may be thrown, the four basic types are the fastball, the changeup (or off-speed pitch), and two breaking balls—the curveball and the slider.

In baseball a batter against whom four balls are recorded is awarded a base on balls or walk, a free advance to first base.

In baseball there are four infielders. a first baseman positioned several steps to the left of first base, a second baseman to the right of second base, a shortstop to the left of second base, and a third baseman to the right of third base.

The 1970 publication of major league pitcher Jim Bouton's tell-all chronicle Ball Four is considered a turning point in the reporting of professional sports. Ball Four is a book written by former Major League Baseball pitcher Jim Bouton in 1970. The book is a diary of Bouton's 1969 season, spent with the Seattle Pilots (during the club's only year in existence) and then the Houston Astros following a late-season trade. In it Bouton also recounts much of his baseball career, spent mainly with the New York Yankees. Despite its controversy at the time, with baseball commissioner Bowie Kuhn's attempts to discredit it and label it as detrimental to the sport, it is considered to be one of the most important sports books ever written[1] and the only sports-themed book to make the New York Public Library's 1996 list of Books of the Century. It also is listed in Time Magazine's 100 greatest non-fiction books of all time.

Roller skates are shoes, or bindings that fit onto shoes, that are worn to enable the wearer to roll along on wheels. The first roller skate was effectively an ice skate with wheels replacing the blade. Later the "quad" style of roller skate became more popular consisting of four wheels arranged in the same configuration as a typical car.

The four wheel in line skate is the most common. Typical recreational skates use frames built out of high-grade polyurethane (plastic). Low-end department or toy store skate frames may be composed of other types of plastic. Speed skate frames are usually built out of carbon fiber or extruded aluminum (more expensive but more solid), magnesium, or even pressed aluminium, which is then folded into a frame (cheaper but less sturdy). Carbon fiber frames are expensive but generally more flexible, making for a smoother ride at the expense of worse power transfer between the leg and the wheels. In general, carbon fiber frames weigh about 160–180 grams. Recently, high-end carbon fiber frames with a monocoque construction have been introduced. They offer the same level of stiffness as aluminum frames while weighing only around 130g. Aluminum can weigh from 170 to 240 grams. Frame length ranges from 2 wheel framed freestyle wheels (used in aggressive skating) to around 230 mm for short-framed four wheel skates (used in most inline designs), up to about 325 mm for a five-wheel racing frame.

Four skating is a figure skating and roller skating discipline. Fours teams consist of two ladies and two men. The sport is similar to pair skating, with elements including overhead lifts, twist lifts, death spirals, and throw jumps, as well as the elements of single skating in unison, pairs elements in unison and unique elements that involve all four skaters. Fours is not an Olympic event and is rarely competed. It was discontinued from the Canadian Figure Skating Championships following the 1996-1997 season.

Figure skating is a sport and activity in which individuals, duos, or groups perform on figure skates on ice. It was the first winter sport included in the Olympics, in 1908.[1] The four Olympic disciplines are men's singles, ladies' singles, pair skating, and ice dancing.

In figure skating jumps are referred to by how many times the skater turns in the air. One revolution (one and a half for the Axel) is a "single" jump. Two revolutions (two and a half for the Axel) is a "double" jump. Three revolutions (three and a half for the Axel) is a "triple" jump. Four revolutions (four and a half for the Axel, although this has never been landed in competition) is a "quadruple" or "quad" jump. The fourth is always different.

In ice skating death spirals can be performed in all four variants of inside/outside and forward/backward edges. The outside edge death spirals are considered more difficult than the inside edge variants. The forward outside death spiral is seen as the hardest of all. In ice skating under the ISU Judging System, the death spiral is abbreviated as "Ds" in the protocol, and preceded by a capital F or B indicating the direction and lower-case i or o for the edge; the level appears as a digit following the four letters.[4] Thus the abbreviations are: Edge Abbreviation Forward Inside FiDs Forward Outside FoDs Backward Inside BiDs Backward Outside BoDs These are the four types. The fourth is different than the other three, which is the nature of the quadrant model pattern. The backward outside death spiral was invented in 1928 by Charlotte Oelschlagel and Curt Neumann,[2] although it was first performed with the skaters holding both hands and the woman not fully lowered toward the ice.

A quad, or quadruple, is a figure skating jump with four or more, but fewer than five, revolutions.[1] Most quadruple jumps have exactly four revolutions; the quadruple Axel has 4½ revolutions, although no figure skater to date has completed this jump, either in practice or in competition.[citation needed] The quadruple toe loop and quadruple Salchow are the two most commonly skated. The first quad Lutz was ratified in 2011. The first person to land a ratified quadruple jump in competition was Kurt Browning in 1988. Quadruple jumps have become increasingly common among World and Olympic level men's single skaters, to the point that not having one in a program may be considered a handicap.

Ice skating Quadruple jump A jump with four full rotations (1440 degrees) in the air. The only quadruple jumps to have been completed in competition are the toe loop, salchow, and lutz by men, and just the salchow for ladies. In a quadruple Axel, the skater would have done 4.5 revolutions (1620 degrees). The highest that a skater can do is a quadruple jump. The forth is always transcendent. The fifth is always ultra transcendent.

The backward outside death spiral was invented in 1928 by Charlotte Oelschlagel and Curt Neumann,[2] although it was first performed with the skaters holding both hands and the woman not fully lowered toward the ice.[citation needed] The current[vague] one-handed version was developed in the 1940s by the Canadian pair Suzanne Morrow and Wallace Diestelmeyer. The other death spiral variants were invented by Ludmila Belousova and Oleg Protopopov in the 1960s.[3] They assigned the following names to them: Cosmic spiral (backward inside), Life spiral (forward inside), and Love spiral (forward outside).

Ice hockey teams usually consist of four lines of three forwards, three pairs of defencemen, and two goaltenders.

In cricket More than one run can be scored from a single hit; but, while hits worth one to three runs are common, the size of the field is such that it is usually difficult to run four or more. To compensate for this, hits that reach the boundary of the field are automatically awarded four runs if the ball touches the ground en route to the boundary or six runs if the ball clears the boundary without touching the ground within the boundary. The batsmen do not need to run if the ball reaches or crosses the boundary. Brian Lara of the West Indies holds the record for highest score in both Tests and first-class cricket. Hits for five are unusual and generally rely on the help of "overthrows" by a fielder returning the ball. The fourth is always different. The fifth is ultra transcendent.

Diagram of a men's college lacrosse field There are ten players in each team: three attackmen, three midfielders, three defensemen, and one goalie. Each player carries a lacrosse stick (or crosse). A "short crosse" (or "short stick") measures between 40 in (1.0 m) and 42 in (1.1 m) long (head and shaft together) and is typically used by attackers or midfielders. A maximum of four players on the field per team may carry a "long crosse" (sometimes called "long pole", "long stick" or "d-pole") which is 52 in (1.3 m) to 72 in (1.8 m) long; typically used by defenders or midfielders.

Lacrosse has four major types: men's field lacrosse, women's lacrosse, box lacrosse and intercrosse. The sport consists of four positions: midfield, attack, defense, goalie. In field lacrosse, attackmen are solely offensive players (except on the "ride", when the opposition tries to bring the ball upfield and attackmen must stop them), defensemen or defenders are solely defensive players (except when bringing up the ball, which is called a "clear"), the goalie is the last line of defense, directly defending the goal, and midfielders or "middies" can go anywhere on the field and play offense and defense, although in higher levels of lacrosse there are specialized offensive and defensive middies.

Tennis is played by millions of recreational players and is also a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the "Majors") are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open played also on hard courts. Wimbledon, the US Open, the French Open, and the Australian Open (dating to 1905) became and have remained the most prestigious events in tennis.[17][24] Together these four events are called the Majors or Slams (a term borrowed from bridge rather than baseball)

Painting

The four cardinal virtues. 1. Codex Aureus of St. Emmeram, Late 10th century; 2. Gospel of Hitda of Meschede, c. 1030. 3. Rhenish Sacramentarium, early 11th century; 4. Sacramentarium of Marmoutier, Autun. 1/2/3 in: KATZENELLENBOGEN (1939). 4. HUBERT et al. (1968/1970).

The ‘quadriga virtutum‘ was in Carolingian times the symbol of the human soul as a carriage with four horses. The wheels gave a further reference to the dynamic character. The cardinal virtues referred to a ‘cardo‘ or pivot, which makes a door turn. The virtues should be regarded, in a metaphorical sense, as the pivot in a human life. In the process of self-knowledge (‘gnothi seauton‘) the division was thought of in qualities, which could improve the quality of life.

‘Num, inquid, currui tuo quartam deese non sentis rotam?’ (Can’t you see that you don’t have the fourth wheel of the wagon), that is the strong remark of count Liuthar to Ekkehard of Meissen and recorded by the German historian Thietmar of Merseburg. It was said on a meeting in the year 1002 AD, concerning the succession to the throne after the sudden death of Otto III in Italy.

HLAWITSCHKA (1978) made an in-depth survey what this expression could mean. He quoted the classical understanding that Ekkehard was no direct relative of the king and had no chance of succession (mangelnde Verwantschaft). Modern investigations resulted in a better insight in the family-relations of the German king and this view did not support the classical interpretation of the expression of Liuthar.

So one has to look further. Searching for an expression which consists of four parts (of which Ekkehard is clearly one missing). There is the (modern) phrase ‘the fifth wheel’, meaning ‘the odd one out’, but this does not refer to a fourth wheel. May be the expression was an invention of the historian Thietmar himself. But what did it mean?

Hlawitschka suggested that the lack of a fourth element (in the character of Ekkehard of Meissen) was a reference to the four cardinal virtues: Prudentia (wisdom/caution), Iustitia (justice), Fortitudo (fortitude/courage) and Temperantia (temperance). His interpretation was based on a common knowledge of the four virtues (‘quadratura mistica‘) in the centuries before and after the first millicennium. Alcuin, Hrabanus Maurus, Halitgar of Cambrai, Ermenrich of Ellwangen and many others used the motif. In particular the Carolingian illustrations provided many examples (‘Besonders sprechend sind die Bildzeugnisse für die Kardinaltugenden in der Karolingischen Malerei‘). Hlawitschka referred to the article of KATZENELLENBOGEN (1939) on the allegories of the virtues and vices in mediaeval art.

The motif of the wheel in relation to the quadripartite division was known to Julianus Pomerius (end fifth century), who recorded in his book ‘De Vita Contemplativa‘: ‘Sed et quatuor flumina quae de paradisi fonte procedunt, vel quatuor Evangelia, divini currus rotae quatuor, et animalia, alae eorum quatuor et facies, dignitatem numeri hujus abunde commendant‘ (MIGNE, 1844/64, PL. 59, Sp. 501). And to the question why there are four is the answer: ‘Quaternarium numerum perfectioni sacratum pene nullus ignorat‘ (EHRHARDT, 1945).

The expression of the historian Thietmar about the fourth wheel should be read as follows: ‘Ekkehard, you are not fit for the kingship, because you lack one of the four cardinal virtues’. Which virtue can only be guessed at, but Thietmar despised Ekkehard’s egocentric actions and blamed him for his lack of humility (‘humilitas‘). The most likely deficient virtue would therefore, be Justitia or Temperantia. In the end, Ekkehard efforts to gain the throne failed, because he was soon afterwards killed by rivaling parties.

This story proves to a certain extend also the importance of tetradic thinking around the year 1000, because it was not necessary to explain this frame of mind to the readers. The same holds for the illustration of the four Christian nations (Slavonia, Germania, Gallia, and Roma), bringing honor to emperor Otto III (fig. 348). Apparently, the symbolism of the tetrad was so strongly embedded in the mind of the intelligentsia at the beginning of the eleventh century, that no further explanation was necessary, being it either four wheels on a carriage or four women bowing for a throne.

Plato mentioned the (four) virtues in the ‘Politeia‘ (MÄHL, 1969). Aristotle, although an important tetradic-minded philosopher, did not separate them. His inquiries tended towards the logical and physical/biological aspects of the cosmos. Even the Greek cultural development was (at that time) not advanced enough to isolate man completely from his surroundings. This could only happen in the declining years of the cultural period, when the philosopher Zenon of Citium (on Cyprus) – living in the third century BC – gave the virtues a central place as a condition of human happiness. Zenon was the founder of the school of philosophy in the ‘Stoa Poecile’ (‘painted arcade’). He mentioned the four principal virtues in a (lost) work on the affects: ————————— Prudentia wisdom/caution ————————— Fortitudo courage/power ————————— Temperantia temperance/consideration ————————— Justitia justice/righteous Since then these virtues are also called the stoic virtues. They coincide with the four positions in a (quadralectic) communication: I. Prudence as a beginning and end, with all the opportunities of an unknown future and the knowledge of an invisible past; II. Fortitude as a dynamic interference with the universe, a time of decision and action; III. Temperance as a tightening up of the reins, establishing the boundaries and obeying them. And finally, IV. Justice as a fair and right way to deal with (the feelings of) other human beings.

The temperaments of Francisco Goya (1746 – 1828). Four pen drawings by Goya (1797/1798). Prado, Madrid. In: NORDSTROM (1961; 1962) and WYNDHAM LEWIS (1968). A comparison between the different interpretations of the temperaments and their associated animals is given below:

It is recorded in the nursery rhyme (song in a four-poster bed): . fourposter ———— Matthew, Mark, Luke and John, ———— Bless the bed that I lie on. ———— Two to foot and two to head, ———— Four to carry me when I’m dead.

Early Christian (Latin) Bible texts – in particular those of North-African origin – gave a different sequence of the evangelists: Matthew, John, Luke and Mark. Their sequence changed to the present one (Matthew, Mark, Luke, John) only at the end of the fourth century (384 AD), in the Latin translation by St. Jerome, the so-called ‘Vulgata‘ (HENDERSON, 1987).

The symbolism of the four evangelists is derived from the Bible book Ezekiel and the Revelations of St. John. Ezekiel wrote his visions during the Babylonian exile. He saw a whirlwind coming from the north, with a great cloud and a fire. In it, he saw four living creatures (called the ‘zooia‘ in the Revelations of St. John). The ‘tetramorph‘ became the symbol of the four evangelists and was compared to the works of Christ (MEYR, 1975

Known as Ganga-Satluj Ka Maidaan (गँगा सतलज का मैदान), this area is drained by 16 major rivers. The major Himalayan Rivers are the Indus, Ganges, and Brahmaputra. These rivers are long,and are joined by many large and important tributaries. Himalayan rivers have long courses from their source to sea.(in India Arabian sea and Bay of Bengal) 16 is the squares of the quadrant model

The period of renewed attention of the virtues took place in the Roman cultural presence during the first half of the first century BC. It found in Cicero (106 – 43 BC) its most important representative. The three books of the ‘De officiis‘ were inspired by the work of the Stoic Panaetius, living in the second century BC. The cardinal virtues were summed up as follows (MILLER, 1921; Book I, V): 1. The full perception and intelligent development of the true (wisdom); 2. The conservation of organized society, with rendering to every man his due, and with the faithful discharge of obligations assumed (justice); 3. The greatness and strength of a noble and invincible spirit (fortitude/ courage); 4. The orderliness and moderation of everything that is said and done, wherein consist temperance and self-control (temperance). It can be noted that, the sequence of the virtues does not follow the Greek/Zenonian succession. Cicero placed the courage in the Third Quadrant, and it became therefore the most ‘visible’ of the four virtues. Compared to the ‘classical’ sequence: (1) Prudence – (2) Fortitude – (3) Temperance – (4) Justice is the ‘Ciceronian’ order given as: 1 – 4 – 2 – 3. It is hard to prove that Cicero employed such a succession on purpose, but in the light of his position in the Roman cultural history – living in the (interpreted) third part of the Third Quadrant (III,3) – such a choice would be understandable. The theme of the virtues was further elaborated by the Church Fathers. Ambrosius (c. 340 – 397 AD) used – in his book ‘De officiis ministrorum‘ – the Platonic-Stoic quadripartite scheme of virtues, which was directly taken from Cicero (including the title). Ambrosius was, in his writings ‘In Lucam’ and ‘De Paradiso’, heavily indebted to Philo of Alexandria, by connecting the Rivers of Paradise with the four main virtues: ‘The Cardinal Virtues could also be set in a wider and more flexible context (..) by correlating them with other groups of four, such as the four Rivers of Paradise, the horns of the altar (horns of consecretation; fig. 344/345), the Evangelists, major prophets, early Fathers.’

The Saxophone Four was a saxophone quartet that played on Main Street U.S.A.. It consisted of members of the Main Street Philharmonic marching band. The group that performed as Main Street Saxophone Four now plays during live shows in the Storybook Circus part of Fantasyland: Giggle Gang and Wowzer.

In music there are four types of triads Use this chart to reference the four types of triads. Major Minor Augmented Diminished Major triads contain a major third and perfect fifth interval, symbolized: R 3 5 (or 0–4–7 as semitones) About this sound play minor triads contain a minor third, and perfect fifth, symbolized: R ♭3 5 (or 0–3–7) About this sound play diminished triads contain a minor third, and diminished fifth, symbolized: R ♭3 ♭5 (or 0–3–6) About this sound play augmented triads contain a major third, and augmented fifth, symbolized: R 3 ♯5 (or 0–4–8) About this sound play Major triads contain a major third with a minor third stacked above it, e.g., in the major triad C–E–G, the interval C–E is major third and E–G is a minor third. minor triads contain a minor third with a major third stacked above it, e.g., in the minor triad A–C–E (A minor), A–C is a minor third and C–E is a major third. diminished triads contain two minor thirds stacked, e.g., B–D–F (B dim) augmented triads contain two major thirds stacked, e.g., D–F♯–A♯ (D aug).

Jewish history works in strange and surprising ways. A perfect example is how the Diaspora spread from Babylonia to North Africa and Spain. Oddly enough, it began with a kidnapping. For centuries, the yeshivas of Babylonia, the birthplace of the Talmud, were the center of Jewish life. At the end of the 8th century, however, they faced a serious economic crisis, as yeshivas are wont to do. They therefore adopted the time-honored formula of sending fundraisers overseas. And because the situation was so desperate, they did not just send out any collectors. They sent the heads of the yeshivas themselves, along with their wives and families. The names of three of them are known to us: Rabbi Shmaryahu, Rabbi Chushiel, and Rabbi Moshe. The fourth man has remained anonymous. The four great rabbis set out together, but in those times, the Mediterranean was a dangerous place. Aside from the storms and the uncertain fate of ships, pirates abounded. And not only did these pirates look for booty, they looked for people whom they could kidnap and sell on the slave market. The pirates knew that if they could capture Jews, especially prominent Jews, they could collect a great ransom. Redeeming the kidnapped is one of the primary mitzvos of the Torah. We’re even allowed to sell a Torah scroll to raise money to save a Jew. Jewish law always had its priorities straight. Jews are not museums, not artifacts, and not a culture – we’re people. People have to be saved from kidnappers. A Torah scroll won’t do anyone any good if there are no Jews to learn from it. Aware of this, the pirates were always on the lookout. They had spies, informers who told them, “This-and-this ship is sailing from this-and-this port with these-and-these people.” The pirates got wind of the fact that there were four great rabbis on this ship, and two or three days out of port, the rabbis were captured. The rabbis were brought to the slave markets in Alexandria, where Rabbi Shmaryahu was ransomed. But the pirates were unable to get a high enough price for all four rabbis, so the remaining captives were brought west to the slave markets of Tunis and Fez. Back then, Tunis and Fez were like the Western frontier. There were Jews there, but they were never able to attract great rabbinic leadership. So now they saw a golden opportunity, and they struck a deal. They told the pirates, “Before we bid on the rabbis, we’d like to talk to them.” Then they made the rabbis an offer. They would ransom them, but they wanted them to stay and build up a thriving Jewish community. Rabbi Chushiel and his son Rabbi Chananel agreed. Rabbi Moshe was ransomed in Spain, though according to the legend, his wife, unfortunately, threw herself into the Mediterranean and drowned rather than submit to the advances of the pirate leader. The fourth rabbi was sold off in Sicily. From these rabbis grew strong Jewish communities, and that is how the scene began to shift. As we know from the history of American Jewry, it only takes a few great people to make a difference. The four rabbis built yeshivas, and eventually students emigrated to come and learn with them. They set a standard that changed the entire complexion of Jewish life so that within 50 to 80 years, North African Jewry no longer felt subservient to Babylonian rule. And that is how the west opened up. Jewish history develops through unexpected twists and turns.

e smaller four-cornered garment, the arba kanfos," that men wear throughout the day, there is also the larger tallis, which men wear only during the morning prayers. This is also called a tallis gadol, which means something like "large wrap-around garment." Some peoplecall this a "prayer shawl," but it is supposed to be much larger than a shawl. The tallis, since it has four corners, must also have tzitzis, and the Laws for them are the same.

Before putting on any four-cornered garment, we must carefully check each corner to make sure the tzitzis are on correctly. For example, every morning, when we get dressed, and we put on our small "arba kanfos," we may not put it on before we have checked to make sure the tzitzis are intact. If the tzitzis were bought from a reliable store, we do not have to check everything about the tzitzis. We just have to check that none of the strings have been torn off, and that each is at least about 1 and 1/2 inches long. If one string has torn and is now less than that length, the tzitzis are still acceptable. If two or more strings on the same corner have torn, and are both now shorter than 1 and 1/2 inches long, then the tzitzis are invalid and must be replaced. You can usually take it to a good Judaica store and ask them to do this for you for a small fee.

The same is true for a tallis, of course.

Hashem told Moses, Speak to the Children of Israel and tell them that they should make "tzitzis" on the corners of their clothing. This pertains to all generations of Jews. You shall put on the tzitzis of each corner one thread of t'chailes. You will have these tzitzis, and when you see them you will remember all the Commandments of Hashem and you will do them, and you will not pursue the desires of you hearts or eyes. So that you remember and do all My Commandments, and you will be holy to your G-d. For I am Hashem your G-d Who has taken you out of Egypt so that I could be your G-d. I am Hashem your G-d.

Art

painting

The Deposition (also called the Florence Pietà, the Bandini Pietà or The Lamentation over the Dead Christ) is a marble sculpture by the Italian High Renaissance master Michelangelo. The sculpture, on which Michelangelo worked between 1547 and 1553, depicts four figures: the dead body of Jesus Christ, newly taken down from the Cross, Nicodemus (or possibly Joseph of Arimathea), Mary Magdalene and the Virgin Mary. The sculpture is housed in the Museo dell'Opera del Duomo in Florence.

Duplo[1] (trademarked as DUPLO) is a product range of the construction toy Lego, designed for children aged 1½ to 5 years old. Duplo bricks are twice the length, height and width of traditional Lego bricks, making them easier to handle and less likely to be swallowed by younger children. Despite their size, they are still compatible with traditional Lego bricks. Initially launched in 1969, the Duplo range has gone on to include sets with figures, cars, houses and trains. This was one of the first plastic brick sets. Duplo is manufactured in Nyíregyháza, Hungary.[2] History Duplo bricks alongside a smaller red regular-sized Lego brick Duplo and regular-sized Lego compatibility demonstrated Duplo bricks were introduced in 1969, in four colors: red, yellow, blue, and white. The studs on the top of legos kind of fit a quadrant formation, and that is the method by which they are attached.

music

The modern banjo comes in a variety of forms, including four- and five-string versions. A six-string version, tuned and played similarly to a guitar, has gained popularity. In almost all of its forms, banjo playing is characterized by a fast arpeggiated plucking, though there are many different playing styles. Four-string banjos, both plectrum and tenor, can be used for chordal accompaniment (as in early jazz), for single string melody playing (as in Irish traditional music), in "chord melody" style (a succession of chords in which the highest notes carry the melody), in tremolo style (both on chords and single strings), and a mixed technique called duo style that combines single string tremolo and rhythm chords. Plectrum banjo Edit The plectrum banjo is a standard banjo without the short drone string. It usually has 22 frets on the neck and a scale length of 26 to 28 inches, and was originally tuned C3 G3 B3 D4. It can also be tuned like the top four strings of a guitar, which is known as "Chicago tuning." As the name suggests, it is usually played with a guitar-style pick (that is, a single one held between thumb and forefinger), unlike the five-string banjo, which is either played with a thumbpick and two fingerpicks, or with bare fingers. The plectrum banjo evolved out of the five-string banjo, to cater to styles of music involving strummed chords. The plectrum is also featured in many early jazz recordings and arrangements. The four-string banjo is used from time to time in musical theater. Examples include: Hello, Dolly!, Mame, Chicago, Cabaret, Oklahoma!, Half a Sixpence, Annie, Barnum, The Threepenny Opera, Monty Python's Spamalot, and countless others. Joe Raposo had used it variably in the imaginative 7-piece orchestration for the long-running TV show Sesame Street, and has sometimes had it overdubbed with itself or an electric guitar. The banjo is still (albeit rarely) in use in the show's arrangement currently.

J Kwon's song Tipsy was a hit when it came out. It begins with 1 here comes the 2 to the 3 to the 4. He begins it by saying the quadrant model four.

"Four Sticks" is a song by the English rock band Led Zeppelin from their 1971 fourth album and is the sixth track from the LP. The title came from the fact that drummer, John Bonham, played with two sets of two drumsticks, totalling four.[3] His decision to play the song with four sticks was a result of him being very frustrated with not being able to get the track down right during recordingsessions at Island Studios. After he grabbed the second pair of sticks and beat the drums as hard as he could, he recorded the perfect take and that was the one they kept. This song was particularly difficult to record, and required more takes than usual.[3] John Paul Jones played a VCS3 synthesizer on the track.

"Four Kicks" is the second single taken from Aha Shake Heartbreak which is the second album by the American rock band Kings of Leon. It peaked at number 24 in the UK singles chart and number 32 in the Irish singles chart. The song's name is reminiscent of Led Zeppelin's Four Sticks, as is the guitar riff.

There are four types of filters four basic types of filters: low-pass, high-pass, band-pass, and band-reject. Low-pass and high-pass filters should already be familiar to you—they are exactly like the "tone" knobs on a car stereo or boombox. A low-pass (also known as high-stop) filter stops, or attenuates, high frequencies while letting through low ones, while a high-pass (low-stop) filter does just the opposite.

Ireland has historically been divided into four provinces: Connacht, Leinster, Munster and Ulster.

Dance

In 1968 synchronised swimming became officially recognized by FINA as the fourth water sport next to swimming, platform diving and water polo. In the United States each swimmer may compete in up to three of the following routine events: solo, duet, trio, combo (consisting of eight to ten swimmers), and team (consisting of four to eight swimmers). The fourth is always different

In competitive diving, during the flight of the dive, one of four positions is assumed: straight – with no bend at the knees or hips (the hardest of the four) pike – with knees straight but a tight bend at the hips (the median in difficulty of the four.) The open pike is a variant where the arms are reached to the side, and the legs are brought straight out with a bend in the hips. tuck – body folded up in a tight ball, hands holding the shins and toes pointed (the easiest of the four.) free – indicates a twisting dive, and a combination of other positions. In the transition between two positions the diver may for example bend their legs or curve at the waist, and points will not be deducted for doing so. These positions are referred to by the letters A, B, C and D respectively.

artistic cycling is performed within a quadrant The riding area for artistic cycling is a wooden court, which also serves cycle ball competitions, that ranges in dimensions from 9 x 12 meters to 11 x 14 meters, where the maximum size is mandated for international competitions. Three concentric circles are taped or painted at the center of the court with diameters (measured to the outside edge of the line) of 0.5, 4, & 8 meters. Four half-meter hashes extend radially from the four quadrants of the middle circle. A clear area of 0.5 to 2 meters must be free of all immovable objects around the perimeter of the court. Two meters is required for international competitions.

Cycle speedway is raced by individuals, pairs or teams. Each race is contested by up to four riders, and a match normally consists of eight to twenty-four races. Points are awarded for placings in each race. A race day fixture might take in up to two, three or more matches. In a team event, the winning team is the one with most points at the end of the day. Races involve up to four riders racing anticlockwise round four laps of the track, the winner being the first across the line. The number of laps varies with the age of the riders but is usually 4 laps for a single race. Competitors use a lightweight single-speed bicycle equipped with a freewheel but without brakes, often a stripped-down mountain bike frame is adequate for beginners although specialist machines are used by the top racers. Riders slide their left foot along the track as they race round turns. Physical contact is legal and often necessary; clothing usually covers the whole body from the neck down, with padding for knees, elbows and hips; helmets are also required since their introduction in 1999,[citation needed] there has never been an accident in cycle speedway resulting in serious injury or death.

Four-cross (4X), also called mountain-cross, not to be confused with fourcross, is a relatively new style of mountain bike racing where four bikers race downhill on a prepared, BMX like, track, simply trying to get down first. These bikes are generally either full suspension with 3 to 4 inches of travel, or hardtails, and typically have relatively strong frames. They run a chainguide on front and gears on the back. They have slack head angles, short chainstays and low bottom brackets for good cornering and acceleration. In recent years the tracks raced on have been rougher and less like those used in BMX. The current world champion is Joost Wichman. Four-cross was added to the UCI Mountain Bike World Cup and the UCI Mountain Bike & Trials World Championships in 2002, replacing dual slalom. It was removed from the World Cup following the 2011 series. A replacement world series, the 4X Pro Tour, was launched in 2012.

Fourcross is a form of four-wheeled downhill mountain biking, pioneered in Canada and the United States. It has the benefit of being suitable for disabled riders. The sport each year is part of the Crankworx festival

Wind conditions can also make otherwise routine sections of a course potentially selective. Cyclists have been finding that three- or four-spoked composite front wheels are more stable when confronting crosswinds.[4] Crosswinds, particularly, alter the position of the "shadow" when drafting a rider, usually placing it diagonally behind the lead rider.

Capoeira (/ˌkæpuːˈɛərə/; Portuguese pronunciation: [kapuˈejɾɐ]) is a Brazilian martial art that combines elements of dance,[1][2][3] acrobatics[4] and music, and is sometimes referred to as a game. There are four basic kinds of songs in capoeira, the Ladaínha, Chula, Corrido and Quadra. The Ladaínha is a narrative solo sung only at the beginning of a roda, often by a mestre (master) or most respected capoeirista present. The solo is followed by a louvação, a call and response pattern that usually thanks God and one's master, among other things. Each call is usually repeated word-for-word by the responders. The Chula is a song where the singer part is much bigger than the chorus response, usually eight singer verses for one chorus response, but the proportion may vary. The Corrido is a song where the singer part and the chorus response are equal, normally two verses by two responses. Finally, the Quadra is a song where the same verse is repeated four times, either three singer verses followed by one chorus response, or one verse and one response.

Malla-yuddha (Devanagari: मल्लयुद्ध,[1] Bengali: মল্লযুদ্ধ, Kannada: ಮಲ್ಲಯುದ್ಧ, Telugu: మల్ల యుద్ధం malla-yuddhaṁ, Tamil: மல்யுத்தம் malyutham, Thai: มัลละยุทธ์ mạllayutṭh̒) is the traditional South Asian form of combat-wrestling[2] created in what is now India, Pakistan, Bangladesh, Nepal and Sri Lanka. It is closely related to Southeast Asian wrestling styles such as naban and is the ancestor of kusti. Malla-yuddha incorporates grappling, joint-breaking, punching, biting, choking and pressure point striking. Matches were traditionally codified into four types which progressed from purely sportive contests of strength to actual full-contact fights known as yuddha.[3] Due to the extreme violence, this final form is generally no longer practised. The second form, wherein the wrestlers attempt to lift each other off the ground for three seconds, still exists in south India. Additionally, malla-yuddha is divided into four styles, each named after Hindu gods and legendary fighters: Hanumanti concentrates on technical superiority, Jambuvanti uses locks and holds to force the opponent into submission, Jarasandhi concentrates on breaking the limbs and joints while Bhimaseni focuses on sheer strength.

Muay Thai] is referred to as the "Art of Eight Limbs" or the "Science of Eight Limbs", because it makes use of punches, kicks, elbows and knee strikes, thus using eight "points of contact", as opposed to "two points" (fists) in boxing and "four points" (hands and feet)

Pradal Serey (Khmer: ប្រដាល់សេរី) or Kun Khmer (Khmer: គុណខ្មែរ) is an unarmed martial art and combat sport from Cambodia.[1] In Khmer, pradal means fighting or boxing and serey means free. Thus, pradal serey may be translated as "free fighting". The sport consists of stand up striking and clinch fighting where the objective is to knock an opponent out, force a technical knockout, or win a match by points. Pradal Serey is most well known for its kicking technique, which generates power from hip rotation rather than snapping the leg, Pradal Serey consists of four types of strikes: punches, kicks, elbows and knee strikes.

Jūnshì Sǎndǎ (Mandarin Chinese, Military Free Fighting): A system of unarmed combat that was designed by Chinese Elite Forces based upon their intense study of traditional martial arts such as traditional Kung Fu, Shuai Jiao, Chin Na and modern hand-to-hand fighting and combat philosophy to develop a realistic system of unarmed fighting for the Chinese military. Jùnshì Sǎndǎ employs all parts of the body as anatomical weapons to attack and counter with, by using what the Chinese consider to be the four basic martial arts techniques: Da – Upper-Body Striking – using fists, open hands, fingers, elbows, shoulders, forearms and the head Ti – Lower-Body Striking – including kicks, knees and stomping Shuai – Throws – using Wrestling and Judo-like takedowns and sweeps, and Chin-Na – Seizing – which includes jointlocks, strangulation and other submissions

Savate (French pronunciation: [saˈvat]), also known as boxe française, French boxing, French kickboxing or French footfighting, is a French martial art which uses the hands and feet as weapons combining elements of western boxing with graceful kicking techniques. In competitive or competition savate which includes Assaut, Pre-Combat, and Combat types, there are only four kinds of kicks allowed along with four kinds of punches allowed: Kicks[edit] fouetté (literally "whip", roundhouse kick making contact with the toe—hard rubber-toed shoes are worn in practice and bouts), high (figure), medium (médian) or low (bas) chassé (side ("chassé lateral") or front ("chassé frontal") piston-action kick, high (figure), medium (médian) or low (bas) revers, frontal or lateral ("reverse" or hooking kick) making contact with the sole of the shoe, high (figure), medium (médian), or low (bas) coup de pied bas ("low kick", a front or sweep kick to the shin making contact with the inner edge of the shoe, performed with a characteristic backwards lean) low only[15][16] Punches[edit] direct bras avant (jab, lead hand) direct bras arrière (cross, rear hand) crochet (hook, bent arm with either hand) uppercut (either hand) Savate did not begin as a sport, but as a form of self-defence and fought on the streets of Paris and Marseille. This type of savate was known as savate de rue. In addition to kicks and punches, training in savate de rue (savate defense) includes knee and elbow strikes along with locks, sweeps, throws, headbutts, and takedowns.[17][18][19][20]

Bartitsu is an eclectic martial art and self-defence method originally developed in England during the years 1898–1902. In 1903, it was immortalised (as "baritsu") by Sir Arthur Conan Doyle, author of the Sherlock Holmes mystery stories.[1] Although dormant throughout most of the 20th century, Bartitsu has been experiencing a revival since 2002. Barton-Wright encouraged members of the Bartitsu Club to study each of the four major hand-to-hand combat styles taught at the Club, each of which broadly corresponded to a different "range" of personal combat.

The following are principles that Lee incorporated into Jeet Kune Do.[6] Lee felt these were universal combat truths that were self-evident, and would lead to combat success if followed. Familiarity with each of the "Four ranges of combat", in particular, is thought to be instrumental in becoming a "total" martial artist. Four ranges of combat Punching Kicking Trapping Grappling Jeet Kune Do students train in each of the aforementioned ranges equally. According to Lee, this range of training serves to differentiate JKD from other martial arts. Lee stated that most but not all traditional martial arts systems specialize in training at one or two ranges. Lee's theories have been especially influential and substantiated in the field of mixed martial arts, as the MMA Phases of Combat are essentially the same concept as the JKD combat ranges. As a historic note, the ranges in JKD have evolved over time. Initially the ranges were categorized as short or close, medium, and long range.[3] These terms proved ambiguous and eventually evolved into their more descriptive forms, although some may still prefer the original three categories.

The Lockdown is a variant of half guard where the defending practitioner further intertwines the legs to achieve a figure four. Using the more extended of their legs, the practitioner traps and drives the foot of the opponent upward; thereby attempting to limit the ability of the opponent to pass to full mount or side control. This position offers a slightly higher likelihood of executing successful sweeps, or reversals, while also offering limited submission options.

Kami shiho gatame (上四方固, "upper four quarter hold down"), and its variations kuzure kami shiho gatame (崩上四方固, "broken upper four quarter hold down"), are the most common pinning holds applied from the north–south position in combat sports using a gi[citation needed]. Kami shiho gatame involves pinning the opponent's arms to his or her side, typically by grabbing the opponent's belt and using the arms to press the arms of the opponent inwards. Kuzure-kami-shiho-gatame is similar, except that one or both arms of the opponent aren't pinned to the side, but can be controlled by for instance pinning them in between an upper arm and a knee.

In shootboxing fighters are awarded points for their success in striking, throwing, and applying standing submission holds to their opponent. They are also given points for four categories of performance: number of times down, amount of damage done to opponent, number of clean hits, and aggressiveness.

Kendo (剣道 kendō?, lit. "sword way") is a modern Japanese martial art, which descended from swordsmanship (kenjutsu) and uses bamboo swords (shinai) and protective armour (bōgu). Today, it is widely practiced within Japan and many other nations across the world. Kendo is an activity that combines martial arts practices and values with strenuous sport-like physical activity. The shinai is meant to represent a Japanese sword (katana) and is made up of four bamboo slats, which are held together by leather fittings. A modern variation of a shinai with carbon fiber reinforced resin slats is also used.[25]

Silambam is a weapon-based Indian martial art from Tamil Nadu, but also traditionally practised by the Tamil community of Sri Lanka and Malaysia. It is closely related to Keralan kalaripayat and Sri Lankan angampora. It derives from the Tamil word silam meaning "hill" and the Kannada word bambu from which the English "bamboo" originates. The term silambambu referred to a particular type of bamboo from the Kurinji hills in present-day Kerala. Thus silambam was named after its primary weapon, the bamboo staff. The related term silambattam often refers specifically to stick-fighting. Beginners are first taught footwork (kaaladi) which they must master before learning spinning techniques and patterns, and methods to change the spins without stopping the motion of the stick. There are sixteen of them among which four are very important. Footwork patterns are the key aspects of silambam. Traditionally, the masters first teach kaaladi for a long time before proceeding to unarmed combat. Training empty-handed allows the practitioner to get a feel of silambam stick movements using their bare hands, that is, fighters have a preliminary training with bare hands before going to the stick. 16 is the number of squares in the quadrant model. There are four very important patterns in the techniques, reflecting the quadrant four.

The sword in ancient Egypt was known by several names, but most are variations of the words sfet, seft or nakhtui. The earliest bronze swords in the country date back 4000 years. Four types of sword are known to have been used: the ma or boomerang-sword based on the hunting stick, the kat or knife-sword, the khopesh or falchion based on the sickle, and a fourth form of straight longsword. Thekhopesh was used region-wide and is depicted as early as the Sixth Dynasty (3000 BC). It was thick-backed and weighted with bronze, sometimes even with gold hilts in the case of pharaohs. The blade may be edged on one or both sides, and was made from iron or blue steel. The double-edge sword had a leaf-shaped blade, and a handle which hollows away at the centre and thickens at each end. These swords are of various lengths, and were paired with shields. Middle Eastern swords became dominant throughout North Africa after the introduction of Islam, after which point swordsmanship in the region becomes that of Arabian or Middle Eastern fencing.

The sword and broadsword are among the four main weapons taught in the Chinese martial arts, the others being the staff and spear. The order in which these weapons is taught may vary between schools and styles, but the jian is generally taught last among the four. The 4 main Chinese Martial Arts weapons taught and used in Wushu in Singapore are 1) The Broad Sword (Dao), 2) The Cudgel (Gun), 3) The Sword (Jian) and lastly 4) The Spear (Qiang). The sequence I have introduced the Wushu weapons also notes its’ level of difficulty, with the Broad Sword being the easiest to learn and master and the Spear being the most intricate.

the Four Poisons of Kumdo" are Surprise, Fear, Doubt (or Hesitation) and Confusion.

For Barrel Racing, Camas Prairie Stump Race courses in horse racing are the shapes of quadrants. A Barrel Racing Course also takes a quadrant formation in which the horse runs.

In Chilean Rodeos the bull can be stopped in four places, and different points are afforded for each place. If the bull is stopped around the head 0 points are given. If it is stopped around the shoulds 2 points. If it is stopped around the waist 3 points. If it is stopped around the rear four points. Rodeo is a traditional sport in Chile. It was declared the national sport in 1962. It has since thrived, especially in the more rural areas of the country. Chilean rodeo is different from the rodeo found in North America. In Chilean rodeo, a team (called a collera) consisting of two riders (called Huasos) and two horses ride laps around an arena trying to stop a calf, pinning it against large cushions. Points are earned for every time the steer is properly driven around the corral, with deductions for faults. Rodeos are conducted in a crescent-shaped corral called a medialuna. The sport, in its modern form, is strictly regulated. Chilean Horses are used exclusively and riders are required to wear traditional huaso garb. Rancagua hosts the annual Campeonato Nacional de Rodeo, the nationwide rodeo championship. The greatest rider in the sport's history is considered Ramón Cardemil, who obtained the national title seven times; the last champions were Juan Carlos Loaiza and Eduardo Tamayo. Riders practice in the countryside throughout Chile, but is most popular in the central zone. Even so, huasos have been known to travel hundreds of miles to compete in competitions. The sport has become so popular that in 2004, more spectators attended rodeo events than professional football matches

Cross country equestrian jumping is an endurance test that forms one of the three phases of the sport of eventing; it may also be a competition in its own right, known as hunter trials or simply "cross-country", although these tend to be lower level, local competitions. The object of the endurance test is to prove the speed, endurance and jumping ability of the true cross-country horse when he is well trained and brought to the peak of condition. At the same time, it demonstrates the rider's knowledge of pace and the use of this horse across country. Historically, the so-called 'long format' endurance test included four phases: Phases A and C, Roads and Tracks; Phase B, the Steeplechase; and Phase D, the Cross-Country. Each phase had to be completed in a set time. Phase A of the roads and tracks was a warming-up period, usually done at a brisk trot, for the purpose of relaxing and loosening up both horse and rider. Phase A led directly to the start for Phase B, the steeplechase. This phase was ridden at a strong gallop to achieve an average speed of 24 miles per hour with six to eight jumps. At the end of the steeplechase, the horse and rider went directly into Phase C, the second roads and tracks. This phase was very important for allowing the horse to relax and recover and to get his wind back to normal. The pace is usually a quiet trot, interspersed with periods of walking and an occasional relaxed canter. Some riders also dismounted and ran next to their horse during this section of the test. The end of Phase C brought the pair to the ten-minute Vet Box prior to starting out on Phase D, the cross-country. Here the horse had a compulsory ten-minute rest allowing a panel of judges and veterinarians to check the horse's temperature, pulse, respiration and soundness. If, in the opinion of the panel, the horse was not fit or sound enough to continue, it was withdrawn from the competition. At this time the horse was sponged down, the tack adjusted and they were prepared for the next phase. Those passing the inspection went to the start box ready for the most exciting phase of the whole endurance test. Disobediences from the horse[edit] First refusal or crossing tracks (circling) in front of an obstacle: 20 penalties per obstacle 2nd refusal or crossed tracks at the same obstacle: 40 additional penalties 3rd refusal or crossed tracks at the same obstacle (an "obstacle" includes all its elements): elimination 4th cumulative refusal or crossed tracks on the entire course: elimination

In horse polo each team consists of four mounted players, which can be mixed teams of both men and women. Each position assigned to a player has certain responsibilities: Number One is the most offence-oriented position on the field. The Number One position generally covers the opposing team's Number Four. Number Two has an important role in offence, either running through and scoring themselves, or passing to the Number One and getting in behind them. Defensively, they will cover the opposing team's Number Three, generally the other team's best player. Given the difficulty of this position, it is not uncommon for the best player on the team to play Number Two so long as another strong player is available to play Three. Number Three is the tactical leader and must be a long powerful hitter to feed balls to Number Two and Number One as well as maintaining a solid defence. The best player on the team is usually the Number Three player, usually wielding the highest handicap. Number Four is the primary defence player. They can move anywhere on the field, but they usually try to prevent scoring. The emphasis on defence by the Number Four allows the Number Three to attempt more offensive plays, since they know that they will be covered if they lose the ball. Polo must be played right-handed.

Pato, also called juego del pato (Spanish pronunciation: [ˈxweɣo ðel ˈpato], literally "duck game"), is a game played on horseback that combines elements from polo and basketball. In modern pato, two four-member teams

The QUADRUPED was an NFL draft day competition held in April 1996 for the Jacksonville Jaguars. This competition format is older than all other disc dog competition formats other than the Ashley Whippet and the FDDO formats. Originally a halftime show for football games with four frisbee dog teams competing to be the last team standing. It turned into an open competition where many more than four teams were able to compete. Today we have The QUADRUPED Series, a group of competitions that are a points championship in the United States. The popularity has been so great within the frisbee dog world that it has spread to Europe where it has occurred in several countries.

All competitions approved by World Minigolfsport Federation are played on standardized courses, whose design has been checked to be suitable for competitive play. The WMF currently approves four different course types: Beton[14] (abbreviated B, sometimes called "Bongni" and named after Paul Bongni of Geneva, Switzerland, "Minigolf" or "Abteilung 1") Eternite[15] (abbreviated E (in Sweden EB), sometimes called "Europabana", "Miniaturgolf" or "Abteilung 2"), Felt[16] (abbreviated F or SFR, sometimes called "Swedish felt runs"), and Minigolf Open System[17] (abbreviated "O", "OS" or "MOS"). The latter non-standardized playing system, MOS, covers all minigolf courses that the three standardized systems (B, E, F) do not cover.

The fountain in juggling is where each hand throws and catches objects and they do not transfer to the opposite hand. This pattern is most commonly used to juggle an even number of objects. In siteswap notation, a four object fountain would be called 4.

Four balls can be juggled. Not really five. Three can be juggled the best. The nature of the quadrant model is the fourth is always different and transcendent.

Gaelic football is one of four sports (collectively referred to as the "Gaelic games") controlled by the Gaelic Athletic Association (GAA), the largest sporting organisation in Ireland Gaelic Games are sports played in Ireland under the auspices of the Gaelic Athletic Association (GAA). Gaelic football and hurling are the two main games. Other games organised by the GAA include Gaelic handball and rounders. Women's versions of hurling and football are also played: camogie, organised by the Camogie Association of Ireland, and ladies' Gaelic football, organised by the Ladies' Gaelic Football Association. While women's versions are not organised by the GAA, they are closely associated with it.[1] Today, Gaelic games are the most popular games in Ireland in terms of supporter attendances at senior games.[2] Despite an economic downturn, attendances in 2009 were up 11% on 2008 Gaelic football[edit] Further information: Gaelic football Gaelic football is played by teams of 15 on a rectangular grass pitch with H-shaped goals at each end. The primary object is to score by driving the ball through the goals, known as a goal or by kicking the ball over the bar, this is known as a point. The team with the highest score at the end of the match wins.[4] The female version of the game is known as ladies' Gaelic football and is very similar to the men's game with a few minor rule changes.[5] Hurling[edit] Further information: Hurling Hurling is a stick and ball game played by teams of 15 on a rectangular grass pitch with H-shaped goals at each end. The primary object is to score by driving the ball through the goals or putting the ball over the bar and thereby scoring a point. Three points is the equivalent of a goal. The team with the highest score at the end of the match wins. It is over three-thousand years old, and is said to be the world's fastest field game, combining skills from lacrosse, field hockey, and baseball in a hard-hitting, highly skilled game.[6] The female version of the game is known as camogie and is very similar to hurling with a few minor rule changes.[7] It was founded in 1832. Gaelic handball[edit] Further information: Gaelic handball Gaelic handball is a game where two players use their hands to return a ball against a wall. The game is similar to American handball. There are three codes of handball; 60x30, 40x20 and One Wall. One Wall handball is the most popular international version of handball with it being played in over 30 countries. It is hoped[by whom?] that this version of handball will soon become an Olympic sport. The sport of handball is governed by GAA Handball in Ireland.[8] Rounders[edit] Further information: Rounders Rounders is a bat and ball game which is played in Ireland; a similar version is played in England. Rounders is the least popular of the GAA Gaelic games and is organised by a sub division of the GAA known as the Rounders Council of Ireland. It is similar to softball.[9]

Four corners is a children's game, often played in elementary schools. The object of the game is for players to choose corners of the room and not get caught by the designated "It" player until they are the last remaining participant.

Competitive trampolining routines consist of combinations of 10 contacts with the trampoline bed combining varying rotations, twists and shapes with take-off and landing in one of four positions: Feet Seat Front Back A routine must always start and finish on feet. In addition to the 10 contacts with the bed in a routine, competitors must start their routine within 60 seconds after presenting to the judges. They are also are permitted up to one "out bounce", a straight jump to control their height at the end of a routine, before sticking the landing. The trampolinist must stop completely - this means that the bed must stop moving as well - and they have to hold still for a count of 3 seconds before moving. In competitions, moves must usually be performed in one of the following 3 basic shapes: Shape Method Tucked with knees clasped to chest by hands Piked with hands touching close to feet and both arms and legs straight Straight body in straight position with legs together, toes pointed, and arms by the sides A fourth 'shape', known as 'puck' because it appears to be a hybrid of pike and tuck, is often used in multiple twisting somersaults - it is typically used in place of a 'tuck' and in competition would normally be judged as an open tuck shape. A straddle, or straddled pike is a variant of a pike with arms and legs spread wide and is only recognised as a move as a shaped jump and not in any somersault moves. The fourth is always different from the previous three but contains elements of them.

Tchoukball /ˈtʃuːkbɔːl/ is an indoor team sport developed in the 1970s by Swiss biologist Hermann Brandt. 2 Right Wings 2 Left Wings 2 Forward Pivots (FP) 1 Centre Pivot (CP)

Steel wolf traps, used frequently in the American west, were made from heavy steel, were six and a half inches wide, and had two springs, each with 100 lbs of power. Steel wolf traps were usually the same models used in the capture of beavers, lynx and wolverine. In order to hide the human scent, trappers would handle their equipment with gloves, and cover the traps in beeswax or blood. As the wolf's power of scent is so great, a mere touch of human skin on the trap will result in the wolf vacating the area. Wolves may also dig up or spring the traps. The traps would typically be set in fours around a bait and strongly fastened to concealed logs, and covered in moss, chaff, cotton or sand for camouflage. Sometimes, the trap and the bait would be placed in a pool of water, thus leaving no other point of access for the wolf to take.

Curling is a sport in which players slide stones on a sheet of ice towards a target area which is segmented into four concentric circles. It is related to bowls, boules and shuffleboard. Two teams, each with four players, take turns sliding heavy, polished granite stones, also called rocks, across the ice curling sheet towards the house, a circular target marked on the ice. Not only are their four concentric circles that the players are aiming four but they are divided into quadrants. Until four stones have been played (two from each side), stones in the free guard zone (those stones left in the area between the hog and tee lines, excluding the house) may not be removed by an opponent's stone (although they can be moved as long as they are not taken out of play). These are known as guard rocks. If the guard rocks are removed, they are replaced to where they were before the shot was thrown, and the opponent's stone is removed from play and cannot be replayed. This rule is known as the four-rock rule or the free guard zone rule (for a while in Canada, a "three-rock rule" was in place, but that rule has been replaced by the four-rock rule). Originally, the Modified Moncton Rule was developed from a suggestion made by Russ Howard for the Moncton 100 cashspiel (with the richest prize ever awarded at the time in a tournament) in Moncton, New Brunswick, in January 1990. "Howard's Rule" (also known as the Moncton Rule), used for the tournament and based on a practice drill his team used, had the first four rocks in play unable to be removed no matter where they were at any time during the end. This method of play altered slightly and adopted as a Four-rock Free Guard Zone for international competition shortly after. Canada kept to the traditional rules until a three-rock Free Guard Zone rule was adopted, starting in the 1993-94 season. After several years of having the three-rock rule used for the Canadian championships and the winners then having to adjust to the four-rock rule in the World Championships, the Canadian Curling Association adopted the now-standard Free Guard Zone in the 2002-2003 season.

Ringette is a team sport with four variations, one winter and three indoor and outdoor versions.

Ice yacht races are usually sailed five times round a triangle of which each leg measures one mile, at least two of the legs being to windward. Ice yachts are divided into four classes, carrying respectively 600 sq ft (60 m2) of canvas or more, between 450 and 600, between 300 and 450, and less than 300 sq ft (30 m2).

In the 1800s, George Pocock used kites of increased size to propel carts on land and ships on the water, using a four-line control system—the same system in common use today. Both carts and boats were able to turn and sail upwind

Four-line (or "quad-line") kites are controlled with a pair of handles, each with two lines attached to the top and bottom and attached to the kite correspondingly. To control the kite, the pilot pulls on the lower line to turn the kite in that direction. Skilled use of these handles allows a quad-line kite to perform in ways that are difficult or impossible with a dual-line kite. Unique quadline maneuvers include reverse flight, axis spins, hovers, and side to side flight. Other aspects of sport kiting include power or traction kites, which can be used to tow wheeled kite buggies (kite buggying) or surfboards (kite surfing). Power kites vary in size from "trainers" which often have dual lines and a small sail area, to large full size traction kites with four lines, designed to pull people on kite boards or vehicles.

Quad-Line Kites[edit]

Quad line kites first hit the kiting scene in 1988 with the invention of the "Neos Omega," later called the "Revolution 1."[3] Quad line kites gained popularity after sport kite team iQuad was formed in 2006.[4] Revolution has dominated the quad-line market, with only a few competing kites from manufacturers like Prism and New Tech Kites. Quad line kites are noticeable by the way that they can hover in space unlike any other sport kite. These kites can be extremely precise.

Adventure racing (also called expedition racing) is typically a multi-disciplinary team sport involving navigation over an unmarked wildnerness course with races extending anywhere from two hours up to two weeks in length. Some races offer solo competition as well. The principle disciplines in adventure racing include trekking, mountain biking, and paddling although races can incorporate a multitude of other disciplines including climbing, abseiling, horse riding, skiing and white water rafting.[1] Teams generally vary in gender mix and in size from two to five competitors, however the premier format is considered to be mixed gender teams of four racers. There is typically no suspension of the clock during races, irrespective of length; elapsed competition time runs concurrently with real time, and competitors must choose if or when to rest.

In 1960-1962 Barry Hill Palmer adapted the flexible wing concept to make foot-launched hang gliders with four different control arrangements.

glider in flight is continuously descending. To achieve an extended flight, the pilot must seek air currents rising faster than the sink rate of the glider. Selecting the sources of rising air currents is the skill that has to be mastered if the pilot wants to achieve flying long distances, known as cross-country (XC). Rising air masses derive from the following sources:[14]

Thermals

The most commonly used source of lift is created by the sun's energy heating the ground which in turn heats the air above it. This warm air rises in columns known as thermals. Soaring pilots quickly become aware of land features which can generate thermals and their trigger points downwind, because thermals have a surface tension with the ground and roll until hitting a trigger point. When the thermal lifts, the first indicator are the swooping birds feeding on the insects being carried aloft, or dust devils or a change in wind direction as the air is pulled in below the thermal. As the thermal climbs, bigger soaring birds indicate the thermal. The thermal rises until it either forms into a cumulus cloud or hits an inversion layer, which is where the surrounding air is becoming warmer with height, and stops the thermal developing into a cloud. Also, nearly every glider contains an instrument known as a variometer (a very sensitive vertical speed indicator) which shows visually (and often audibly) the presence of lift and sink. Having located a thermal, a glider pilot will circle within the area of rising air to gain height. In the case of a cloud street, thermals can line up with the wind, creating rows of thermals and sinking air. A pilot can use a cloud street to fly long straight-line distances by remaining in the row of rising air.

Ridge lift

Ridge lift occurs when the wind encounters a mountain, cliff or hill. The air is pushed up the windward face of the mountain, creating lift. The area of lift extending from the ridge is called the lift band. Providing the air is rising faster than the gliders sink rate, gliders can soar and climb in the rising air by flying within the lift band and at right angle to the ridge. Ridge soaring is also known as slope soaring.

Mountain waves

The third main type of lift used by glider pilots is the lee waves that occur near mountains. The obstruction to the airflow can generate standing waves with alternating areas of lift and sink. The top of each wave peak is often marked by lenticular cloud formations.

Convergence

Another form of lift results from the convergence of air masses, as with a sea-breeze front. More exotic forms of lift are the polar vortices which the Perlan Project hopes to use to soar to great altitudes.[15] A rare phenomenon known as Morning Glory has

Lightweight carts or "trikes" (called "quads" if they have four wheels) can be mounted on powered paragliders for those who prefer not to, or are unable to, foot launch. Some are permanent units.

Biathlon is a winter sport that combines cross-country skiing and rifle shooting. This sport has its origins in an exercise for Norwegian people, as an alternative training for the military. Norwegian skiing regiments organized military skiing contests in the 18th century, divided in four classes: shooting at mark while skiing at top speed, downhill race among trees, downhill race on big hills without falling, and a long race on flat ground while carrying rifle and military pack. The competitions from 1958 to 1965 used high-power centerfire cartridges, such as the .30-06 Springfield and the 7.62×51mm NATO, before the .22 Long Rifle rimfire cartridge was standardized in 1978. The ammunition was carried in a belt worn around the competitor's waist. The sole event was the men's 20 kilometres (12 mi) individual, encompassing four separate ranges and firing distances of 100 metres (330 ft), 150 metres (490 ft), 200 metres (660 ft), and 250 metres (820 ft). The target distance was reduced to 150 metres (490 ft) with the addition of the relay in 1966. The shooting range was further reduced to 50 metres (160 ft) in 1978 with the mechanical targets making their debut at the 1980 Winter Olympics in Lake Placid A biathlon competition consists of a race in which contestants ski around a cross-country trail system, and where the total distance is broken up by either two or four shooting rounds, half in prone position, the other half standing. Depending on the shooting performance, extra distance or time is added to the contestant's total running distance/time. The contestant with the shortest total time wins. The 20 kilometres (12 mi) individual race (15 kilometres (9.3 mi) for women) is the oldest biathlon event; the distance is skied over five laps. The biathlete shoots four times at any shooting lane,[7] in the order of prone, standing, prone, standing, totaling 20 targets. For each missed target a fixed penalty time, usually one minute, is added to the skiing time of the biathlete. Competitors' starts are staggered, normally by 30 seconds. In a pursuit, biathletes' starts are separated by their time differences from a previous race,[8] most commonly a sprint. The contestant crossing the finish line first is the winner. The distance is 12.5 kilometres (7.8 mi) for men and 10 kilometres (6.2 mi) for women, skied over five laps; there are four shooting bouts (two prone, two standing, in that order), and each miss means a penalty loop of 150 metres (490 ft). To prevent awkward and/or dangerous crowding of the skiing loops, and overcapacity at the shooting range, World Cup Pursuits are held with only the 60 top ranking biathletes after the preceding race. The biathletes shoot on a first-come, first-served basis at the lane corresponding to the position they arrived for all shooting bouts. In the mass start, all biathletes start at the same time and the first across the finish line wins. In this 15 kilometres (9.3 mi) for men or 12.5 kilometres (7.8 mi) for women competition, the distance is skied over five laps; there are four bouts of shooting (two prone, two standing, in that order) with the first shooting bout being at the lane corresponding to the competitor's bib number (Bib #10 shoots at lane #10 regardless of position in race), with the rest of the shooting bouts being on a first-come, first-served basis (If a competitor arrives at the lane in fifth place, they shoot at lane 5). As in sprint and pursuit, competitors must ski one 150 metres (490 ft) penalty loop for each miss. Here again, to avoid unwanted congestion, World Cup Mass starts are held with only the 30 top ranking athletes on the start line (half that of the Pursuit as here all contestants start simultaneously). The relay teams consist of four biathletes, who each ski 7.5 kilometres (4.7 mi) (men) or 6 kilometres (3.7 mi) (women), each leg skied over three laps, with two shooting rounds; one prone, one standing. For every round of five targets there are eight bullets available, though the last three can only be single-loaded manually one at a time from spare round holders or bullets deposited by the competitor into trays or onto the mat at the firing line. If after eight bullets there are still misses, one 150 m (490 ft) penalty loop must be taken for each missed target remaining. The first-leg participants start all at the same time, and as in cross-country skiing relays, every athlete of a team must touch the team's next-leg participant to perform a valid changeover. On the first shooting stage of the first leg, the participant must shoot in the lane corresponding to their bib number (Bib #10 shoots at lane #10 regardless of position in race), then for the remainder of the relay, the relay team shoots on a first-come, first-served basis (arrive at the range in fifth place, shoot at lane 5) The most recent addition to the number of biathlon competition variants, the mixed relay is similar to the ordinary relay but the teams are composed of two women and two men. Legs 1 and 2 are done by the women, legs 3 and 4 by the men. The women's legs are 6 kilometres (3.7 mi) and men's legs are 7.5 kilometres (4.7 mi) as in ordinary relay competitions. A team consists of four biathletes, but unlike the relay competition, all team members start at the same time. Two athletes must shoot in the prone shooting round, the other two in the standing round. In case of a miss, the two non-shooting biathletes must ski a penalty loop of 150 m (490 ft). The skiers must enter the shooting area together, and must also finish within 15 seconds of each other; otherwise a time penalty of one minute is added to the total time. Since 2004, this race format has been obsolete at the World Cup level. f

There are four player styles in soccer Goalkeeper[edit] Shot stopper A goalkeeper known as being very good at saving strikes on goal, many at point blank range. They are known for having great reactions, an almost instinctive ability to anticipate where to position themselves and to dive or spread themselves in order to effect a save, often from a shot that may look impossible to prevent going in. They can be recognized by a high saves to shots ratio. Sweeper Keeper With the advent of the offside rule, the role of a sweeping defender or libero has become pretty much obsolete. However, in the last decades it has become popular for goalkeepers to take that role instead. A sweeping goalkeeper is good at reading the game, and prevents scoring opportunities by clearing passes and crosses outside of the goal area without the use of his hands. Defensive[edit] Attacking full-back An attacking full-back (or wing-back) is a defender stationed on the flank with emphasis on attack as well as defense. The name wing-back is a portmanteau of "winger" (see above) and "full-back". As the role combines that of the winger and the full-back, attacking full-backs need to be blessed with good stamina. Where a teams fields three centre-backs, the attacking full-back is expected to concentrate more on providing support for strikers than concentrating on their defensive duties.[63] Libero The libero (Italian: free) or sweeper is a more versatile type of defender that "sweeps up" the ball if the opponent manages to break the defensive line. Their position is rather more fluid than other defenders who mark their designated opponents.[41] Sweepers are usually faster than that of the other players on the team, and are built slightly smaller than the others. The sweeper's ability to read the game is even more vital than for a centre-back; they also are usually confident on the ball and possess good passing and vision, as they are often responsible for starting plays from the back-line.[19] The catenaccio system of play, used in Italian football in the 1960s, notably employed a defensive libero.[20] Stopper Stoppers are skilled defenders who rely on their strength, stamina and man marking abilities to be able to stop the opposition's attacking play by making strong tackles. They are usually uncompromising in their tackling and would rather give away a foul than let an opposition player get past them with the ball. Stoppers usually play as centre-backs or could be a defensive midfielder playing in front of the defence. Midfield[edit] Ball winner A ball winner is a player skilled at winning the ball back from the opposition through tackling and interceptions in the midfield area of the pitch. They endeavour to break up the opposition's attacking play by regaining possession. Ball winners are usually defensive midfielders or central midfielders but this can also be an attribute of a defender. Defensive midfielder Defensive midfielders are central midfield players that focus more on defence than attack. They need strength to make strong tackles and they also need stamina and some degree of passing skill as they need to support other midfielders. Creative midfielder Creative midfielders are midfield players that are able to create goal scoring opportunities for the team often in situations where nothing seems likely. They usually have good ball control, passing ability and movement and will be blessed with vision and on-the-ball intelligence. They are usually attacking midfielders, though second strikers, wingers and central midfielders can also be known as creative players. Box to box Box to box midfielders help with almost every aspect of the game. They need immense stamina as they need to cover most areas of the pitch, as well as some degree of passing skills. They would be up one end of the pitch assisting the attack one moment then back helping to defend around their own penalty area the next. They normally play as central midfielders but any of the midfield players may have this attribute. Pulls wide right/left These are wide midfielders that have pace and/or dribbling ability to be able to beat defenders along the flank. They will have the habit of running wide whenever they get possession of the ball or when their team is attacking, to receive the ball. Their most important skill is to be able to cross the ball into the penalty box to create opportunities for strikers. Sometimes strikers will pull right or left as a tactic to draw a defender out of position or to get into unmarked space. Playmaker Playmakers are midfielders that controls the flow of attacking play, starting off attacking moves. They have good passing ability and also good off-the-ball ability and vision to be able to read the game and to see where goal-scoring opportunities may come from. Playmakers usually play as central midfielders or attacking midfielders, but some play as defensive midfielders (known as deep-lying playmakers). Midfield general A central midfield player who absolutely controls the midfield area, directing team play and breaking up the opponent's attacks. They are known for having the biggest influence on their team's overall performances, driving them forward to attack, putting sustained pressure on the opposition and leading by example when the team is defending. They more often than not will be the team captain. Attacking[edit] Dribbler Dribblers are players known for their close ball control ability that is used to go past defenders by sudden change of direction and acceleration sometimes combined with great pace. The skill is used to create opportunities for other attackers or to score themselves having broken through the opposition's defence using what is sometimes referred to as "trickery". One of the great spectator sights in football is a player going on a "mazy run" with the ball, twisting and turning to avoid opposition tackles, beating a number of players. They usually play as wingers, secondary strikers or attacking midfielders, but in some cases, a centre forward may also have these skills. Counter attacker Counter attackers are any attacking player that uses their pace to beat defenders and cause unexpected scoring opportunities at any time. They also need some degree of shooting skill. Counter attacking opportunities occur when the opposition are themselves attacking a team with most of their players forward. A counterattack happens when the ball is won back and is quickly played into space for a counterattacking player to run onto or where a player takes the ball themselves and runs with pace into a sparsely defended opposition half. Clinical finisher Clinical finishers are forwards that specialise in their accurate shooting ability. They are "clinical" in that they need few opportunities to score a goal being able to strike and place the ball exactly where it will beat the goalkeeper. They can be identified by their high goal to shots ratio. Clinical strikers usually play as centre forwards though other attacking players can often be said to be clinical finishers. Target man Target men are forwards that generally have a high degree of physical strength and are usually tall in height. They are able to make space, score goals, or hold up play with the ball waiting for support no matter how much pressure defenders are putting on them. They specialise in taking and controlling the ball in the air or along the ground often from long passes, strength to hold off defenders when receiving long passes and sometimes volleying the ball. The term "target" refers to the fact that other team players will use them to play long balls or crosses to even though they may be surrounded by opposition defenders. The role is unique to centre forwards. Goal poacher Goal poachers are forwards who wait in the six-yard box or the penalty area for a cross, pass or loose ball and pounce to try to score a goal. Their "poaching" refers to the fact that they will often score a goal out of the slightest of opportunities i.e. steal a goal. Goal poachers usually play as centre forwards or second strikers. False nine A false nine is a player who appears to be playing as a centre-forward (traditionally a number nine shirt), but drops deeps or pulls wide disrupting the opposing team's marking. Usually the centre forward will be marked by one of the centre-backs but the false nine will often move away into a grey area causing a dilemma on whether the centre-back follows, isolating them from the other centre-back or stays where they are, making themselves redundant.

Flat back four In 1958, the Brazil national team won their first of five World Cups to date thanks to the "flat back four" system they had developed to counter the Hungarians' M–U. Two centre-backs would mark the inside-forwards' runs from deep, while the wider full-backs would not only cut out the threat of the opposing wingers but also provide width on the counter-attack. The relative lack of numbers in the middle of the park meant a creative presence was required, and for the Brazilians, that presence was provided in the form of their dazzling midfielder Didi. Also in Mario Zagallo they had a left winger years ahead of his time, proficient at funnelling back and helping out the midfield when the team lost possession.

The 2010 World Cup confirmed a general shift toward a broadly counter-attacking, reactive 4–2–3–1 formation by the tournament's more successful teams.[64] Indeed, of the four semi-finalists in that tournament, all but Uruguay employed some variation of this tactic. This shape tends to utilise fluid movement between the four wing players, with full-backs expected to provide plenty of support to the wingers in front of them. Following the World Cup, most of the world's major leagues[clarification needed] have seen this tactic being used by an increasing number of teams

In rugby union, World Rugby regulates the size and shape of the ball under Law 2 (also known as Law E.R.B); an official rugby union ball is oval and made of four panels

The posture of zazen is seated, with folded legs and hands, and an erect but settled spine.[9] The hands are folded together into a simple mudra over the belly.[9] In many practices, the practitioner breathes from the hara (the center of gravity in the belly) and the eyelids are half-lowered, the eyes being neither fully open nor shut so that the practitioner is neither distracted by, nor turning away from, external stimuli. The legs are folded in one of the four standard sitting styles Kekkafuza (full-lotus) Hankafuza (half-lotus) Burmese (a cross-legged posture in which the ankles are placed together in front of the sitter) Seiza (a kneeling posture using a bench or zafu)

Today there are four major branches of BJJ from Brazil: Gracie Humaita, Gracie Barra, Carlson Gracie Jiu-Jitsu and Alliance Jiu Jitsu. Each branch can trace its roots back to Mitsuyo Maeda via the Gracie family or Oswaldo Fadda.

Pinning holds in budō from the mount include tate shiho gatame (縦四方固, "horizontal four quarters hold", also called hon-tate-shiho-gatame,[1] 本縦四方固), which is similar to kata-gatame except that it is performed from the mount. The opponent's arm is pinned against his or her neck, and the head and arm are held tightly. This may result in a potent arm triangle choke. In its variations kuzure-tate-shiho-gatame (崩縦四方固, "modified horizontal four quarters hold"), the arm is not held against the neck, but rather, one of the arms may be held. The stability of these pinning holds or the mount in general, can be increased by entangling the opponents legs with the own legs, a technique known as grapevining.

A figure-four is a grappling joint-lock that resembles the number "4". A keylock or toe hold can be referred to as a figure-four hold, when it involves a figure-four formation with the legs or arms. If the figure-four involves grabbing the wrists with both hands, it is sometimes called a double wrist lock. A figure-four hold done with the legs around the neck and (usually) arm of an opponent is often called a triangle choke, and is a common submission in mixed martial arts and Brazilian jiu jitsu. Prior to this, this form was in Japanese martial arts, where it is known as Sankaku-Jime. The wrestling move figure 4 leg lock was made famous by WWE Hall of Famer Ric "The Nature Boy" Flair.

A Nelson Hold (aka Elfakhani Hold) is a grappling hold which is executed from behind the opponent, generally when both are on the mat face down with the opponent under the aggressor. One or both arms are used to encircle the opponent's arm under the armpit, and secured at the opponent's neck. Several different nelson holds exist, and they can be separated according to the positioning of the encircling arm(s). A nelson is used to control an opponent or to turn him over on his back and execute a pin. The term "nelson" is derived from "full nelson", which dates back to the early 19th century. It has been suggested that it was named after the British war-hero Admiral Horatio Nelson, who used strategies based on surrounding the opponent to win the Battle of the Nile and the Battle of Trafalgar, but its true origin remains uncertain.[ Quarter nelson[edit] The quarter nelson involves putting one hand on the opponent's neck, passing the free arm under the arm of the opponent, and locking the free arm to the other arm by clasping the wrist. In amateur wrestling a strong quarter nelson can be used to secure a pin, or to control the opponent and advance into a more dominant position. Half nelson[edit] Half nelson. Power half nelson. The half nelson is referred to by most coaches as being the easiest, but most effective move in folkstyle wrestling, and is very commonly used. The half nelson is done using only one hand, by passing it under the arm of the opponent and locking the hand on the opponent's neck. In addition, the hand not being used should be holding the opponent's other wrist in so that they can not post the hand or peel the half nelson off. A power half nelson is a type of half nelson. The hand not performing the nelson is placed on the opponent's head to increase the overall power of the half nelson. When the half nelson has been put into place, it is used to turn the opponent over onto his back. This is accomplished by using the hand to press the opponent's neck down, while using the arm under the opponent's shoulder to lift the shoulder and drive it perpendicularly to the opponent's body. When the opponent has been turned over onto his back, the aggressor attempts to pin him by tightening the grip on the neck, putting the nelson in more deeply so that the aggressor's elbow is hooking the opponent's neck. Often the aggressor remains perpendicular to the opponent, chest on chest. The aggressor's free hand is used to minimize struggling by hooking the opponent's near or far leg or crotch. Countering the half nelson[edit] When the aggressor is in the process of putting the half nelson in, the opponent can attempt to prevent it from going in deeply by using his affected arm to clamp down on the intruding arm. This is especially effective if the opponent is on his knees instead of lying flat, which is why the half nelson should not be attempted until the opponent's stomach is on the ground. When the aggressor is driving forward perpendicularly to the opponent's body, the opponent can try to avoid being flipped over onto his back by extending his opposite foot in the direction of the undesired movement, and planting it. Once the opponent is on his back, he can attempt to avoid having his shoulders pinned to the mat, and to get off his back, by planting his feet and pushing the mat with them, allowing him to roll his head back so the top of his head is on the mat, rather than the back of his neck being on the aggressor's arm. From this position he can try to turn over either toward or away from the aggressor. Three-quarter nelson[edit] The three-quarter nelson is done by performing a half nelson using one hand, and passing the other hand underneath the opponent from the same side. The passing hand goes under the opponent's neck and around the far side to the top of the neck, where it is locked with the other hand around the neck at the wrist or using a palm-to-palm or interlacing fingers grip. The three-quarter nelson can be used in amateur wrestling to pin the opponent, and is more secure than a half-nelson. Full nelson[edit] Full nelson. The full nelson (sometimes called a double nelson or a double shoulder lock) is done by performing half nelsons with both arms. In collegiate, high school, middle school/junior high school, and most other forms of amateur wrestling, the move is illegal. The holder is on the back side of the opponent, and has his or her hands extended upwards under the opponents armpits, holding the neck with a palm-to-palm grip or with interlaced fingers. By cranking the hands forward, pressure can be applied to the neck of the opponent. The usage of the full nelson in combat sports is very limited. It is a secure hold which can be used to control the opponent, but does not allow for finishing action, such as pinning the opponent, executing a reliable submission hold, or allowing for effective striking.[2] Because it can be used as a limited neck crank, it is considered dangerous in some grappling arts, and is banned, for instance, in amateur wrestling.

Crucifix neck crank[edit] The crucifix neck crank is similar to the cattle catch, but involves the combatant performing the neck crank being mounted on the opponent. Both of the opponent's arms are controlled, and the opponent's head is held in the armpit. By cranking the body upwards while keeping a tight hold on the opponents arms, the opponents head is forced towards his or her chest. Both the cattle catch and the crucifix neck crank are colloquially referred to simply as the crucifix, which often leads to confusion with the traditional crucifix position.

The Crucifix position, also known as the Salaverry, is a ground grappling position that involves being perpendicularly behind the opponent, chest against back, and controlling the opponent's arms. One of the opponent's arms is controlled using the legs, and the other using the arms, hence effectively putting the opponent in a position resembling a crucifix. This position allows for elbow strikes to the head, or if the opponent is wearing a gi, it allows for a collar strangle called the crucifix choke (in Judo known as jigoku jime, 地獄絞, "hell strangle").[1] It is also possible to have the crucifix position in such a way that a crucifix neck crank can be applied.

In march madness there is the sweet 16 elite eight final four and championship. There are 16 squares in the quadrant model and four quadrants with four squares in each. Each level of march madness denotes a transision in the wuadrant model. The first 8 squares (two quadrants) are conservative and the last eight are destructive. The first two are conservatibe the last two are destructive in each quadrant

There are four basic punches in boxing: the jab, cross, hook and uppercut. Any punch other than a jab is considered a power punch. If a boxer is right-handed (orthodox), his left hand is the lead hand and his right hand is the rear hand. For a left-handed boxer or southpaw, the hand positions are reversed. For clarity, the following discussion will assume a right-handed boxer. Jab – A quick, straight punch thrown with the lead hand from the guard position. The jab is accompanied by a small, clockwise rotation of the torso and hips, while the fist rotates 90 degrees, becoming horizontal upon impact. As the punch reaches full extension, the lead shoulder can be brought up to guard the chin. The rear hand remains next to the face to guard the jaw. After making contact with the target, the lead hand is retracted quickly to resume a guard position in front of the face. The jab is recognized as the most important punch in a boxer's arsenal because it provides a fair amount of its own cover and it leaves the least amount of space for a counter punch from the opponent. It has the longest reach of any punch and does not require commitment or large weight transfers. Due to its relatively weak power, the jab is often used as a tool to gauge distances, probe an opponent's defenses, harass an opponent, and set up heavier, more powerful punches. A half-step may be added, moving the entire body into the punch, for additional power. Some notable boxers who have been able to develop relative power in their jabs and use it to punish or 'wear down' their opponents to some effect include Larry Holmes and Wladimir Klitschko. Cross – A powerful, straight punch thrown with the rear hand. From the guard position, the rear hand is thrown from the chin, crossing the body and traveling towards the target in a straight line. The rear shoulder is thrust forward and finishes just touching the outside of the chin. At the same time, the lead hand is retracted and tucked against the face to protect the inside of the chin. For additional power, the torso and hips are rotated counter-clockwise as the cross is thrown. A measure of an ideally extended cross is that the shoulder of the striking arm, the knee of the front leg and the ball of the front foot are on the same vertical plane.[40] Weight is also transferred from the rear foot to the lead foot, resulting in the rear heel turning outwards as it acts as a fulcrum for the transfer of weight. Body rotation and the sudden weight transfer is what gives the cross its power. Like the jab, a half-step forward may be added. After the cross is thrown, the hand is retracted quickly and the guard position resumed. It can be used to counter punch a jab, aiming for the opponent's head (or a counter to a cross aimed at the body) or to set up a hook. The cross is also called a "straight" or "right", especially if it does not cross the opponent's outstretched jab. Hook – A semi-circular punch thrown with the lead hand to the side of the opponent's head. From the guard position, the elbow is drawn back with a horizontal fist (knuckles pointing forward) and the elbow bent. The rear hand is tucked firmly against the jaw to protect the chin. The torso and hips are rotated clockwise, propelling the fist through a tight, clockwise arc across the front of the body and connecting with the target. At the same time, the lead foot pivots clockwise, turning the left heel outwards. Upon contact, the hook's circular path ends abruptly and the lead hand is pulled quickly back into the guard position. A hook may also target the lower body and this technique is sometimes called the "rip" to distinguish it from the conventional hook to the head. The hook may also be thrown with the rear hand. Notable left hookers include Joe Frazier , Roy Jones Jr. and Mike Tyson. Ricardo Dominguez (left) throws an uppercut on Rafael Ortiz (right).[41] Uppercut – A vertical, rising punch thrown with the rear hand. From the guard position, the torso shifts slightly to the right, the rear hand drops below the level of the opponent's chest and the knees are bent slightly. From this position, the rear hand is thrust upwards in a rising arc towards the opponent's chin or torso. At the same time, the knees push upwards quickly and the torso and hips rotate anti-clockwise and the rear heel turns outward, mimicking the body movement of the cross. The strategic utility of the uppercut depends on its ability to "lift" the opponent's body, setting it off-balance for successive attacks. The right uppercut followed by a left hook is a deadly combination employing the uppercut to lift the opponent's chin into a vulnerable position, then the hook to knock the opponent out.

In tennis the scoring system reflects the quadrant model pattern. It goes 15, 30, 40, game. The final score is transcendent

Among coaches, single-wing football denotes a formation using a long snap from center as well as a deceptive scheme that evolved from Glenn "Pop" Warner's offensive style. Traditionally, the single-wing was an offensive formation that featured a core of four backs including a tailback, a fullback, a quarterback (blocking back), and a wingback.

The team in possession of the football has a limited number of downs (four downs in American football)

Offensive positions[edit] Up to four players can be behind the line of scrimmage, but one is always designated the quarterback (defined as the player who receives the ball from the center). Upon the snap of the ball, the quarterback becomes the ball carrier. The three other backs can be halfbacks, (who primarily carry the ball), fullbacks, (who primarily block), or they can play near (but not on) the line of scrimmage to act as extra tight ends or wide receivers. A tight end that fills the role as the 4th back is often called an "H-Back" and a wide receiver that fills that role is sometimes known as a "flanker" or a "slot" receiver (depending on where he lines up). Most formations have a "strong" side (the side with the tight end, or the side with more players) and a "weak side" (the side opposite the tight end, or the side with fewer players).

In American football, a 4–3 defense is a defensive alignment consisting of four down linemen and three linebackers. It is probably the most commonly used defense in modern American football and especially in the National Football League

NFL teams that use the 4–3 defense as of 2014 include the Dallas Cowboys, Atlanta Falcons, Oakland Raiders, Minnesota Vikings, Carolina Panthers, Cincinnati Bengals, Jacksonville Jaguars, St. Louis Rams, Detroit Lions, New England Patriots, Tampa Bay Buccaneers, Seattle Seahawks, Miami Dolphins, Buffalo Bills, New Orleans Saints, and the New York Giants. The Patriots returned to the 4–3 in the 2011 NFL Season. The Bills began using a 4-3 since 2014 and will stick with the 4-3 under defense with the hiring of new head coach Rex Ryan. The New York Jets used variations of the 4–3 for the 2012 NFL season against spread offenses, but will stick with the 3-4 defense as its base. The Falcons returned to a 4–3 defense after a year of failed experience with a 3–4 defense, and DC Mike Nolan and HC Mike Smith were let go.

The offense may put one of the 4 backfield players in motion after the set but before the snap. The motion must be either parallel to or (if in the backfield) away from the line of scrimmage at the snap

There are four downs in football

Stance is the position an American football player adopts when a play begins. There are three common stances used by linemen: two-point, three-point, and four-point. The stance names reference the number of points where a player's body is touching the ground while down in the stance.

Relay races are the only track and field event in which a team of runners directly compete against other teams.[46] Typically, a team is made up of four runners of the same sex. Each runner completes their specified distance (referred to as a leg) before handing over a baton to a team mate, who then begins their leg upon receiving the baton. There is usually a designated area where athletes must exchange the baton. Teams may be disqualified if they fail to complete the change within the area, or if the baton is dropped during the race. A team may also be disqualified if its runners are deemed to have wilfully impeded other competitors. Girls handing over the baton in a relay race in Leipzig in 1950 Relay races emerged in the United States in the 1880s as a variation on charity races between firemen, who would hand a red pennant on to team mates every 300 yards. There are two very common relay events: the 4×100 metres relay and the 4×400 metres relay. Both events entered the Olympic programme at the 1912 Summer Games after a one-off men's medley relay featured in 1908 Olympics.[47] The 4×100 m event is run strictly within the same lane on the track, meaning that the team collectively runs one complete circuit of the track. Teams in a 4×400 m event remain in their own lane until the runner of the second leg passes the first bend, at which point runners can leave their lanes and head towards the inner-most part of the circuit. For the second and third baton change overs, team mates must align themselves in respect of their team position – leading teams take the inner lanes while team mates of the slower teams must await the baton on outer lanes.[46][48] The IAAF keeps world records for five different types of track relays. As with 4×100 m and 4×400 m events, all races comprise teams of four athletes running the same distances, with the less commonly contested distances being the 4×200 m, 4×800 m and 4×1500 m relays.[49] Other events include the distance medley relay (comprising legs of 1200 m, 400 m, 800 m, and 1600 m), which is frequently held in the United States, and a sprint relay, known as the Swedish medley relay, which is popular in Scandinavia and held at the World Youth Championships in Athletics programme.[50] Relay events have significant participation in the United States, where a number of large meetings (or relay carnivals) are focused almost exclusively on relay events.[51]

Vertical jumps (High Jump and Pole Vault) set a bar at a particular height. The competitor must clear the bar without knocking it off the standards that are holding the bar (flat). Three failures in a row ends the competitor's participation in the event. The competitor has the option to PASS their attempt, which can be used to strategic advantage (of course that advantage is lost if the competitor misses). A pass could be used to save energy and avoid taking a jump that would not improve their position in the standings. After all competitors have either cleared, passed or failed their attempts at a height, the bar goes up. The amount the bar goes up is predetermined before the competition, though when one competitor remains, that competitor may choose their own heights for the remaining attempts. A record is kept of each attempt by each competitor. After all competitors have taken their attempts, the one jumping the highest is the winner, and so on down the other competitors in the event. Ties are broken by first, the number of attempts taken at the highest height (fewest wins), and then if still tied, by the total number of misses in the competition as a whole. The bar does not go back to a lower height except to break a tie for first place or a qualifying position. If those critical positions are still tied after applying the tiebreakers, all tied competitors take a fourth jump at the last height. If they still miss, the bar goes down one increment where they again jump. This process continues until the tie is broken.

Track and field contains some of the foremost kinds of throwing sports, and the four major disciplines are the only pure throwing events to feature at the Olympic Games.[75] Shot put[edit] Remigius Machura preparing to throw within the circle Main article: Shot put The genesis of the shot put can be traced to pre-historic competitions with rocks:[76] in the Middle ages the stone put was known in Scotland and the steinstossen was recorded in Switzerland. In the 17th century, cannonball throwing competitions within the English military provided a precursor to the modern sport.[77][78] The modern rules were first laid out in 1860 and required that competitors take legal throws within a square throwing area of seven feet (2.13 m) on each side. This was amended to a circle area with a seven-foot diameter in 1906, and the weight of the shot was standardised to 16 pounds (7.26 kg). Throwing technique was also refined over this period, with bent arm throws being banned as they were deemed too dangerous and the side-step and throw technique arising in the United States in 1876.[77] The shot put has been an Olympic sport for men since 1896 and a women's competition using a 4 kg (8.82 lb) shot was added in 1948. Further throwing techniques have arisen since the post-war era: in the 1950s Parry O'Brien popularised the 180 degree turn and throw technique commonly known as the "glide", breaking the world record 17 times along the way, while Aleksandr Baryshnikov and Brian Oldfield introduced the "spin" or rotational technique in 1976.[77][79] Discus throw[edit] Zoltán Kővágó preparing to spin and throw the discus Main article: Discus throw As one of the events within the ancient pentathlon, the history of the discus throw dates back to 708 BC.[80] In ancient times a heavy circular disc was thrown from a set standing position on a small pedestal, and it was this style that was revived for the 1896 Olympics.[81] This continued until the 1906 Intercalated Games in Athens, which featured both the ancient style and the increasingly popular modern style of turning and throwing. By the 1912 Olympics, the ancient standing throw style had fallen into disuse and contests starting within a 2.5 m squared throwing area became the standard.[82] The discus implement was standardised to 2 kg (4.4 pounds) in weight and 22 cm (8 inches) in diameter in 1907.[81] The women's discus was among the first women's events on the Olympic programme, being introduced in 1928.[83] Javelin throw[edit] Bregje Crolla beginning to throw the javelin Main article: Javelin throw As an implement of war and hunting, javelin throwing began in prehistoric times.[84] Along with the discus, the javelin was the second throwing event in the ancient Olympic pentathlon. Records from 708 BC show two javelin competition types co-existing: throwing at a target and throwing the javelin for distance. It was the latter type from which the modern event derives.[85] In ancient competitions, athletes would wrap an ankyle (thin leather strip) around the javelin that acted as a sling to facilitate extra distance.[86] The javelin throw gained much popularity in Scandinavia in the late 18th century and athletes from the region are still among the most dominant throwers in men's competitions.[85] The modern event features a short run up on a track and then the thrower releases the javelin before the foul line. The first Olympic men's javelin throw contest was held in 1908 and a women's competition was introduced in 1932.[84][87] The first javelins were made of various types of wood, but in the 1950s, former athlete Bud Held introduced a hollow javelin, then a metal javelin, both of which increased throwers performances.[85] Another former athlete, Miklós Németh invented the rough-tailed javelin and throws reached in excess of 100 m – edging towards the limits of stadia.[88] The distances and the increasing number of horizontal landings led the IAAF to redesign the men's javelin to reduce distance and increase the implement's downward pitching moment to allow for easier measurement. Rough-tailed designs were banned in 1991 and all marks achieved with such javelins were removed from the record books. The women's javelin underwent a similar redesign in 1999.[85] The current javelin specifications are 2.6 to 2.7 m in length and 800 grams in weight for men, and between 2.2 to 2.3 m and 600 g for women.[89] Hammer throw[edit] Yury Shayunou spinning with the hammer within the circle Main article: Hammer throw The earliest recorded precursors to the modern hammer throw stem from the Tailteann Games around 1800 BC, which featured events such as throwing either a weight attached to a rope, a large rock on a wooden handle, or even a chariot wheel on a wooden axle.[90] Other ancient competitions included throwing a cast iron ball attached to a wooden handle – the root of the term "hammer throw" due to their resemblance to the tools.[91] In 16th century England, contests involving the throwing of actual blacksmith's Sledgehammers were recorded.[90] The hammer implement was standardised in 1887 and the competitions began to resemble the modern event. The weight of the metal ball was set at 16 pounds (7.26 kg) while the attached wire had to measure between 1.175 m and 1.215 m.[91] The men's hammer throw became an Olympic event in 1900 but the women's event – using a 4 kg (8.82 lb) weight – was not widely competed until much later, finally featuring on the women's Olympic programme a century later.[92] The distances thrown by male athletes became greater from the 1950s onwards as a result of improved equipment using the denser metals, a switch to concrete throwing areas, and more advanced training techniques.[93] Professional hammer throwers as historically large, strong, sturdy athletes. However, qualities such as refined technique, speed and flexibility have become increasingly important in the modern era as the legal throwing area has been reduced from 90 to 34.92 degrees and throwing technique involves three to four controlled rotations.[

There are four jumping events in track Long jump Naide Gomes in the jumping phase of the event Main article: Long jump The long jump is one of the oldest track and field events, having its roots as one of the events within the ancient Greek pentathlon contest. The athletes would take a short run up and jump into an area of dug up earth, with the winner being the one who jumped farthest.[57] Small weights (Halteres) were held in each hand during the jump then swung back and dropped near the end to gain extra momentum and distance.[58] The modern long jump, standardised in England and the United States around 1860, bears resemblance to the ancient event although no weights are used. Athletes sprint along a length of track that leads to a jumping board and a sandpit.[59] The athletes must jump before a marked line and their achieved distance is measured from the nearest point of sand disturbed by the athlete's body.[60] The athletics competition at the first Olympics featured a men's long jump competition and a women's competition was introduced at the 1948 Summer Olympics.[59] Professional long jumpers typically have strong acceleration and sprinting abilities. However, athletes must also have a consistent stride to allow them to take off near the board while still maintaining their maximum speed.[60][61] In addition to the traditional long jump, a standing long jump contest exists which requires that athletes leap from a static position without a run-up. A men's version of this event featured on the Olympic programme from 1900 to 1912.[62] Triple jump[edit] Main article: Triple jump Similar to the long jump, the triple jump takes place on a track heading towards a sandpit. Originally, athletes would hop on the same leg twice before jumping into the pit, but this was changed to the current "hop, step and jump" pattern from 1900 onwards.[63] There is some dispute over whether the triple jump was contested in ancient Greece: while some historians claim that a contest of three jumps occurred at Ancient Games,[63] others such as Stephen G. Miller believe this is incorrect, suggesting that the belief stems from a mythologised account of Phayllus of Croton having jumped 55 ancient feet (around 16.3 m).[58][64] The Book of Leinster, a 12th-century Irish manuscript, records the existence of geal-ruith (triple jump) contests at the ancient Tailteann Games.[65] Phillips Idowu in the phases of the triple jump The men's triple jump competition has been ever-present at the modern Olympics, but it was not until 1993 that a women's version gained World Championship status and went on to have its first Olympic appearance three years later.[63] A men's standing triple jump event featured at the 1900 and 1904 Olympics but such competitions have since become very uncommon, although it is still used as a non-competitive exercise drill.[66] High jump[edit] Main article: High jump The first recorded instances of high jumping competitions were in Scotland in the 19th century.[67] Further competitions were organised in 1840 in England and in 1865 the basic rules of the modern event were standardised there.[68] Athletes have a short run up and then take off from one foot to jump over a horizontal bar and fall back onto a cushioned landing area.[69] The men's high jump was included in the 1896 Olympics and a women's competition followed in 1928. Jumping technique has played a significant part in the history of the event. High jumpers typically cleared the bar feet first in the late 19th century, using either the Scissors, Eastern cut-off or Western roll technique. The straddle technique became prominent in the mid-20th century, but Dick Fosbury overturned tradition by pioneering a backwards and head-first technique in the late 1960s – the Fosbury Flop – which won him the gold at the 1968 Olympics. This technique has become the overwhelming standard for the sport from the 1980s onwards.[68][70] The standing high jump was contested at the Olympics from 1900 to 1912, but is now relatively uncommon outside of its use as an exercise drill. Pole vault[edit] Anna Giordano Bruno releases the pole after clearing the bar Main article: Pole vault In terms of sport, the use of poles for vaulting distances was recorded in Fierljeppen contests in the Frisian area of Europe, and vaulting for height was seen at gymnastics competitions in Germany in the 1770s.[71] One of the earliest recorded pole vault competitions was in Cumbria, England in 1843.[72] The basic rules and technique of the event originated in the United States. The rules required that athletes do not move their hands along the pole and athletes began clearing the bar with their feet first and twisting so that the stomach faces the bar. Bamboo poles were introduced in the 20th century and a metal box in the runway for planting the pole became standard. Landing mattresses were introduced in the mid-20th century to protect the athletes who were clearing increasingly greater heights.[71] The modern event sees athletes run down a strip of track, plant the pole in the metal box, and vault over the horizontal bar before letting go of the pole and falling backwards onto the landing mattress.[73] While earlier versions used wooden, metal or bamboo, modern poles are generally made from artificial materials such as fibreglass or carbon fibre.[74] The pole vault has been an Olympic event since 1896 for men, but it was over 100 years later that the first women's world championship competition was held at the 1997 IAAF World Indoor Championships. The first women's Olympic pole vaulting competition occurred in 2000.

In Track there are four sprint races Common contemporary distances[edit] 60 m[edit] The 60 metres is normally run indoors, on a straight section of an indoor athletic track. Since races at this distance can last around six or seven seconds, having good reflexes and thus getting off to a quick start is more vital in this race than any other. This is roughly the distance required for a human to reach maximum speed and can be run with one breath. It is popular for training and testing in other sports (e.g., speed testing for American football, although 40 yards is more common there). The world record in this event is held by American sprinter Maurice Greene with a time of 6.39 seconds. 60-metres is used as an outdoor distance by younger athletes when starting sprint racing. Note: Indoor distances are less standardized as many facilities run shorter or occasionally longer distances depending on available space. 60m is the championship distance. 100 m[edit] Tyson Gay completes a 100m race The 100 metres sprint takes place on one length of the home straight of a standard outdoor 400 m track. Often, the world-record holder in this race is considered "the world's fastest man/woman." The current world record of 9.58 seconds is held by Usain Bolt of Jamaica and was set on 16 August 2009, at the 2009 World Athletics Championships. The women's world record is 10.49 seconds and was set by Florence Griffith-Joyner. World class male sprinters (sub 10.10s) need 41 to 50 strides to cover the whole 100 metres distances.[10] 200 m[edit] The 200 metres begins on the curve of a standard track (where the runners are staggered in their starting position, to ensure that they all run the same distance), and ends on the home straight. The ability to "run a good bend" is key at the distance, as a well conditioned runner will typically be able to run 200 m in an average speed higher than their 100 m speed. Usain Bolt, however, ran 200 m in the world-record time of 19.19 sec, an average speed of 10.422 m/s, whereas he ran 100 m in the world-record time of 9.58 sec, an average speed of 10.438 m/s. Indoors, the race is run as one lap of the track, with only slightly slower times than outdoors. A slightly shorter race (but run on a straight track), the stadion, was the first recorded event at the ancient Olympic Games and the oldest known formal sports event in history. A 200 m bend The world record in this event is 19.19 seconds, held by Usain Bolt and was set on 20 August 2009, at the 2009 World Athletics Championships. 400 m[edit] The 400 metres is one lap around the track on the inside lane. Runners are staggered in their starting positions to ensure that everyone runs the same distance. While this event is classified as a sprint, there is more scope to use tactics in the race; the fact that 400 m times are considerably more than four times a typical 100 m time demonstrates this. The world record is currently held by Michael Johnson with a time of 43.18 seconds. The fourth is always different.

In track the hammer throw has three to four rotations.

There are four hurdle events in the olympics. They are 60 m hurdles 100 m hurdles 110 m hurdles 400 m hurdles Again notice how the fourth is a lot different from the previous three.

Modern darts have four parts: The points, the barrels, the shafts and the fletching

Among the wide variety of pitches that may be thrown, the four basic types are the fastball, the changeup (or off-speed pitch), and two breaking balls—the curveball and the slider.

In baseball a batter against whom four balls are recorded is awarded a base on balls or walk, a free advance to first base.

In baseball there are four infielders. a first baseman positioned several steps to the left of first base, a second baseman to the right of second base, a shortstop to the left of second base, and a third baseman to the right of third base.

The 1970 publication of major league pitcher Jim Bouton's tell-all chronicle Ball Four is considered a turning point in the reporting of professional sports. Ball Four is a book written by former Major League Baseball pitcher Jim Bouton in 1970. The book is a diary of Bouton's 1969 season, spent with the Seattle Pilots (during the club's only year in existence) and then the Houston Astros following a late-season trade. In it Bouton also recounts much of his baseball career, spent mainly with the New York Yankees. Despite its controversy at the time, with baseball commissioner Bowie Kuhn's attempts to discredit it and label it as detrimental to the sport, it is considered to be one of the most important sports books ever written[1] and the only sports-themed book to make the New York Public Library's 1996 list of Books of the Century. It also is listed in Time Magazine's 100 greatest non-fiction books of all time.

Roller skates are shoes, or bindings that fit onto shoes, that are worn to enable the wearer to roll along on wheels. The first roller skate was effectively an ice skate with wheels replacing the blade. Later the "quad" style of roller skate became more popular consisting of four wheels arranged in the same configuration as a typical car.

The four wheel in line skate is the most common. Typical recreational skates use frames built out of high-grade polyurethane (plastic). Low-end department or toy store skate frames may be composed of other types of plastic. Speed skate frames are usually built out of carbon fiber or extruded aluminum (more expensive but more solid), magnesium, or even pressed aluminium, which is then folded into a frame (cheaper but less sturdy). Carbon fiber frames are expensive but generally more flexible, making for a smoother ride at the expense of worse power transfer between the leg and the wheels. In general, carbon fiber frames weigh about 160–180 grams. Recently, high-end carbon fiber frames with a monocoque construction have been introduced. They offer the same level of stiffness as aluminum frames while weighing only around 130g. Aluminum can weigh from 170 to 240 grams. Frame length ranges from 2 wheel framed freestyle wheels (used in aggressive skating) to around 230 mm for short-framed four wheel skates (used in most inline designs), up to about 325 mm for a five-wheel racing frame.

Four skating is a figure skating and roller skating discipline. Fours teams consist of two ladies and two men. The sport is similar to pair skating, with elements including overhead lifts, twist lifts, death spirals, and throw jumps, as well as the elements of single skating in unison, pairs elements in unison and unique elements that involve all four skaters. Fours is not an Olympic event and is rarely competed. It was discontinued from the Canadian Figure Skating Championships following the 1996-1997 season.

Figure skating is a sport and activity in which individuals, duos, or groups perform on figure skates on ice. It was the first winter sport included in the Olympics, in 1908.[1] The four Olympic disciplines are men's singles, ladies' singles, pair skating, and ice dancing.

In figure skating jumps are referred to by how many times the skater turns in the air. One revolution (one and a half for the Axel) is a "single" jump. Two revolutions (two and a half for the Axel) is a "double" jump. Three revolutions (three and a half for the Axel) is a "triple" jump. Four revolutions (four and a half for the Axel, although this has never been landed in competition) is a "quadruple" or "quad" jump. The fourth is always different.

In ice skating death spirals can be performed in all four variants of inside/outside and forward/backward edges. The outside edge death spirals are considered more difficult than the inside edge variants. The forward outside death spiral is seen as the hardest of all. In ice skating under the ISU Judging System, the death spiral is abbreviated as "Ds" in the protocol, and preceded by a capital F or B indicating the direction and lower-case i or o for the edge; the level appears as a digit following the four letters.[4] Thus the abbreviations are: Edge Abbreviation Forward Inside FiDs Forward Outside FoDs Backward Inside BiDs Backward Outside BoDs These are the four types. The fourth is different than the other three, which is the nature of the quadrant model pattern. The backward outside death spiral was invented in 1928 by Charlotte Oelschlagel and Curt Neumann,[2] although it was first performed with the skaters holding both hands and the woman not fully lowered toward the ice.

A quad, or quadruple, is a figure skating jump with four or more, but fewer than five, revolutions.[1] Most quadruple jumps have exactly four revolutions; the quadruple Axel has 4½ revolutions, although no figure skater to date has completed this jump, either in practice or in competition.[citation needed] The quadruple toe loop and quadruple Salchow are the two most commonly skated. The first quad Lutz was ratified in 2011. The first person to land a ratified quadruple jump in competition was Kurt Browning in 1988. Quadruple jumps have become increasingly common among World and Olympic level men's single skaters, to the point that not having one in a program may be considered a handicap.

Ice skating Quadruple jump A jump with four full rotations (1440 degrees) in the air. The only quadruple jumps to have been completed in competition are the toe loop, salchow, and lutz by men, and just the salchow for ladies. In a quadruple Axel, the skater would have done 4.5 revolutions (1620 degrees). The highest that a skater can do is a quadruple jump. The forth is always transcendent. The fifth is always ultra transcendent.

The backward outside death spiral was invented in 1928 by Charlotte Oelschlagel and Curt Neumann,[2] although it was first performed with the skaters holding both hands and the woman not fully lowered toward the ice.[citation needed] The current[vague] one-handed version was developed in the 1940s by the Canadian pair Suzanne Morrow and Wallace Diestelmeyer. The other death spiral variants were invented by Ludmila Belousova and Oleg Protopopov in the 1960s.[3] They assigned the following names to them: Cosmic spiral (backward inside), Life spiral (forward inside), and Love spiral (forward outside).

Ice hockey teams usually consist of four lines of three forwards, three pairs of defencemen, and two goaltenders.

In cricket More than one run can be scored from a single hit; but, while hits worth one to three runs are common, the size of the field is such that it is usually difficult to run four or more. To compensate for this, hits that reach the boundary of the field are automatically awarded four runs if the ball touches the ground en route to the boundary or six runs if the ball clears the boundary without touching the ground within the boundary. The batsmen do not need to run if the ball reaches or crosses the boundary. Brian Lara of the West Indies holds the record for highest score in both Tests and first-class cricket. Hits for five are unusual and generally rely on the help of "overthrows" by a fielder returning the ball. The fourth is always different. The fifth is ultra transcendent.

Diagram of a men's college lacrosse field There are ten players in each team: three attackmen, three midfielders, three defensemen, and one goalie. Each player carries a lacrosse stick (or crosse). A "short crosse" (or "short stick") measures between 40 in (1.0 m) and 42 in (1.1 m) long (head and shaft together) and is typically used by attackers or midfielders. A maximum of four players on the field per team may carry a "long crosse" (sometimes called "long pole", "long stick" or "d-pole") which is 52 in (1.3 m) to 72 in (1.8 m) long; typically used by defenders or midfielders.

Lacrosse has four major types: men's field lacrosse, women's lacrosse, box lacrosse and intercrosse. The sport consists of four positions: midfield, attack, defense, goalie. In field lacrosse, attackmen are solely offensive players (except on the "ride", when the opposition tries to bring the ball upfield and attackmen must stop them), defensemen or defenders are solely defensive players (except when bringing up the ball, which is called a "clear"), the goalie is the last line of defense, directly defending the goal, and midfielders or "middies" can go anywhere on the field and play offense and defense, although in higher levels of lacrosse there are specialized offensive and defensive middies.

Tennis is played by millions of recreational players and is also a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the "Majors") are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open played also on hard courts. Wimbledon, the US Open, the French Open, and the Australian Open (dating to 1905) became and have remained the most prestigious events in tennis.[17][24] Together these four events are called the Majors or Slams (a term borrowed from bridge rather than baseball)

A quad scull, or quadruple scull in full, is a rowing boat used in the sport of competitive rowing. It is designed for four persons who propel the boat by sculling with two oars, one in each hand A 'quad' is different to a 'four' in that a 'quad', or quadruple scull, is composed of four rowers each with two blades, sculling. A 'four' is made up of four rowers each with one oar in hand, sweeping.

An eight is a rowing boat used in the sport of competitive rowing. It is designed for eight rowers, who propel the boat with sweep oars, and is steered by a coxswain, or "cox".

Each of the eight rowers has one oar. There are four rowers on the stroke side (rower's right hand side) and four on the bow side (rower's lefthand side).

A coxless four is a rowing boat used in the sport of competitive rowing. It is designed for four persons who propel the boat with sweep oars. The crew consists of four rowers, each having one oar. There are two rowers on the stroke side (rower's right hand side) and two on the bow side (rower's lefthand side). There is no cox, but the rudder is controlled by one of the crew, normally with the rudder cable attached to the toe of one of their shoes which can pivot about the ball of the foot, moving the cable left or right. The steersman may row at bow, who has the best vision when looking over their shoulder, or on straighter courses stroke may steer, since they can point the stern of the boat at some landmark at the start of the course. The equivalent boat when it is steered by a cox is referred to as a "coxed four". Racing boats (often called "shells") are long, narrow, and broadly semi-circular in cross-section in order to reduce drag to a minimum. Originally made from wood, shells are now almost always made from a composite material (usually carbon-fibre reinforced plastic) for strength and weight advantages. Fours have a fin towards the rear, to help prevent roll and yaw and to help the rudder. The riggers are staggered alternately along the boat so that the forces apply asymmetrically to each side of the boat. If the boat is sculled by rowers each with two oars the combination is referred to as a quad scull. In a quad scull the riggers apply forces symmetrically. A sweep oared boat has to be stiffer to handle the unmatched forces, and so requires more bracing, which means it has to be heavier than an equivalent sculling boat. However most rowing clubs cannot afford to have a dedicated large hull with four seats which might be rarely used and instead generally opt for versatility in their fleet by using stronger shells which can be rigged for either as fours or quads. "Coxless four" is one of the classes recognized by the International Rowing Federation.[1] and is an event at the Olympic Games. In 1868, Walter Bradford Woodgate rowing a Brasenose coxed four arranged for his coxswain to jump overboard at the start of the Stewards' Challenge Cup at Henley Royal Regatta to lighten the boat. The unwanted cox narrowly escaped strangulation by the water lilies, but Woodgate and his home-made steering device triumphed by 100 yards and were promptly disqualified. This led to the adoption of Henley Regatta rules specifically prohibiting such conduct and a special prize for four-oared crews without coxswains was offered at the regatta in 1869. However in 1873 the Stewards cup was changed to a coxless four event.[2]

The Olympic Games are held every four years, where only select boat classes are raced (14 in total): Men: quad scull, double scull, single scull, eight, coxless four, and coxless pair Lightweight Men: coxless four and double scull Women: quad scull, double scull, single scull, eight, and coxless pair Lightweight Women: double scull

A coxed four is a rowing boat used in the sport of competitive rowing. It is designed for four persons who propel the boat with sweep oars and is steered by a coxswain. The crew consists of four rowers, each having one oar, and a cox. There are two rowers on the stroke side (rower's right hand side) and two on the bow side (rower's lefthand side). The cox steers the boat using a rudder and may be seated at the stern of the boat where there is a view of the crew or in the bow (known as a bowloader). With a bowloader, amplification is needed to communicate with the crew which is sitting behind, but the cox has a better view of the course and the weight distribution may help the boat go faster. When there is no cox, the boat is referred to as a "coxless four". Racing boats (often called "shells") are long, narrow, and broadly semi-circular in cross-section in order to reduce drag to a minimum. Originally made from wood, shells are now almost always made from a composite material (usually carbon-fibre reinforced plastic) for strength and weight advantages. Fours have a fin towards the rear, to help prevent roll and yaw and to help the rudder. The riggers are staggered alternately along the boat so that the forces apply asymmetrically to each side of the boat. If the boat is sculled by rowers each with two oars the combination is referred to as a quad scull. In a quad scull the riggers apply forces symmetrically. A sweep oared boat has to be stiffer to handle the unmatched forces, and so requires more bracing, which means it has to be heavier than an equivalent sculling boat. However most rowing clubs cannot afford to have a dedicated large hull with four seats which might be rarely used and instead generally opt for versatility in their fleet by using stronger shells which can be rigged for either as fours or quads. "Coxed four" is one of the classes recognized by the International Rowing Federation. It was one of the original events in the Olympics but was dropped in 1992.[1]

The World Archery Federation, commonly known as WA and formerly as FITA (Fédération Internationale de Tir à l'Arc), defines a suite of rounds based on a 24-target course. Four target face sizes are specified: 80 cm; 60 cm; 40 cm and 20 cm. Six target faces of each size are used on the course. For each target face size there are upper and lower distance limits for the various divisions of archer. Target faces have four black outer rings and a yellow spot, each with an equal width. The yellow spot is subdivided into two rings. The black rings score 1 point for the outermost to 4 points for the innermost. A hit in the outer yellow scores 5 points. A hit in the inner yellow scores 6 points. Before April 2008, the innermost yellow ring counted as an X (the number of Xs was used for tie-breaks) but only scored 5 points.

American handball is a sport in which players use their hands to hit a small rubber ball against a wall such that their opponent cannot do the same without it touching the ground twice. The three versions are four-wall, three-wall and one-wall. Each version can be played either by two players (singles), three players (cutthroat) or four players (doubles). By the early 1900s, four-wall handball was well established and a one-wall game was developed in New York City by beach-goers who hit bald tennis balls with their hands against the sides of the wooden jetties that lined beaches. This led to a rise in one-wall handball at New York beaches and by the 1930s, thousands of indoor and outdoor one-wall courts had been built throughout the city.[5] American handball is seen predominantly in parks, beaches, and high school yards in New York, Chicago and other large urban areas.

In Ireland, there are four main types of handball. There is 40x20 (small court), the traditional 60x30 Softball & Hardball (big alley) and One-wall handball. One-wall handball has become very popular over the past 3 years and it is the most popular version of international handball. It is played in over 74 countries including the USA, Mexico, Ecuador, Spain, the Basque Country. Gaelic handball (known in Ireland simply as handball;[1][2][3][4] Irish: liathróid láimhe) is a sport played in Ireland where players hit a ball with a hand or fist against a wall in such a way as to make a shot the opposition cannot return,[5] and that may be played with two (singles) or four players (doubles). The sport is similar to American handball (a related and almost identical game), Basque pelota, racquetball and squash. It is one of the four Gaelic games organised by the Gaelic Athletic Association (GAA).[6] In 2009, Irish Handball was rebranded as GAA Handball.

Racquetball games can be played with two, three or four players, with doubles or singles matches being most common. Two player games are called singles or "one-up" (one vs. one for the entire game), while four player games are doubles with two pairs playing against each other (two vs. two for the entire game). Tournament competitions have divisions for singles or doubles or both

Racketlon is a combination sport where competitors play a sequence of the four most popular racket sports: table tennis, badminton, squash, and tennis. In a regulation game, two individuals (or two pairs in doubles) play each other in four sets, one in each sport. Each set has the same format: the serve switches every two points, with the first serve of the two in badminton, squash and tennis always being from the right, and the set finishes when one player has earned 21 points with at least a 2-point margin. The sets are played from smallest racket to largest: first table tennis, then badminton, squash, and finally tennis. The player (or pair) who has won the most points overall wins the match. If the score is tied after all four sets, the tie is broken by one extra tennis point. Other than the scoring, each point follows the respective sport's international rules.

Squash is a racquet sport played by two (singles) or four players (doubles) in a four-walled court with a small, hollow rubber ball. The players must alternate in striking the ball with their racquet and hit the ball onto the playable surfaces of the four walls of the court. Squash was invented in Harrow School out of the older game racquets around 1830 before the game spread to other schools, eventually becoming an international sport. The first courts built at this school were rather dangerous because they were near water pipes, buttresses, chimneys, and ledges. The school soon built four outside courts. Natural rubber was the material of choice for the ball. Students modified their racquets to have a smaller reach to play in these cramped conditions. Squash balls are between 39.5 and 40.5 mm in diameter, and have a weight of 23 to 25 grams.[3] They are made with two pieces of rubber compound, glued together to form a hollow sphere and buffed to a matte finish. Different balls are provided for varying temperature and atmospheric conditions and standards of play: more experienced players use slow balls that have less bounce than those used by less experienced players (slower balls tend to "die" in court corners, rather than "standing up" to allow easier shots). Depending on its specific rubber composition, a squash ball has the property that it bounces more at higher temperatures. Squash balls must be hit dozens of times to warm them up at the beginning of a session; cold squash balls have very little bounce. Small colored dots on the ball indicate its dynamic level (bounciness), and thus the standard of play for which it is suited. The recognized speed colors indicating the degree of dynamism are: Color Speed (of Play) Bounce Player Level Double yellow Extra Super Slowest Very low Experienced Yellow Super Slow Low Advanced White Slow Low Advanced/Medium Blue Fast Very high Beginner/Junior Some ball manufacturers such as Dunlop use a different method of grading balls based on experience. They still have the equivalent dot rating, but are named to help choose a ball that is appropriate for one's skill level. The four different ball types are Intro (Blue dot), Progress (Red dot), Competition (single yellow dot) and Pro (double yellow dot). The squash court is a playing surface surrounded by four walls. The court surface contains a front line separating the front and back of the court and a half court line, separating the left and right hand sides of the back portion of the court, creating three 'boxes' - the front half, the back left quarter and the back right quarter. Both the back two boxes contain smaller service boxes. All of the floor-markings on a squash court are only relevant during serves. There are four walls to a squash court. The front wall, on which three parallel lines are marked, has the largest playing surface, whilst the back wall, which typically contains the entrance to the court, has the smallest. The out line runs along the top of the front wall, descending along the side walls to the back wall. There are no other markings on the side or back walls. Shots struck above or touching the out line, on any wall, are out. The bottom line of the front wall marks the top of the 'tin', a half metre-high metal area which if struck means that the ball is out. In this way the tin can be seen as analogous to the net in other racquet sports such as tennis. The middle line of the front wall is the service line and is only relevant during serves.

Squash tennis is an American variant of squash, but played with a ball and racquets that are closer to the equipment used for lawn tennis, and with somewhat different rules. For younger players the game offers the complexity of squash and the speed of racquetball. It also has exercise and recreational potential for older players.

Squash tennis is played in various four-walled courts. The front wall (against which the ball is served) features a telltale (usually clad in tin) at the bottom couple feet from the floor, a service line about 6 feet (1.8 m) from the floor, and an out-of-bounds line around 16 feet (4.9 m) from the floor. The back wall out line is 4.5 feet (1.4 m) from the floor. There are two required lines on the floor: a service line about 10 feet (3.0 m) from the back wall, and a center court line running at least from the front wall to the service line. Unlike a squash racquets court, there are no service boxes. There are four types of courts:

North American squash court[edit]

A North American squash court is 18.5 by 32 feet (5.6 by 9.8 m). Originally designed for the related game of squash racquets, by the early 1930s the National Squash Tennis Association (NSTA) approved play on this kind of court. The dimensions are quite similar to the official squash tennis court. The only required modifications are the addition of a 4.5-foot (1.4 m) back wall line (in N. American squash the back wall line is 6.5 feet or 2.0 metres from the floor) and the center court line on the floor. Temporary lines can easily be added with blue painter's tape. The problem today is that as the North American version of squash becomes less popular, new courts are not being built, and many old ones are being converted to other uses.

Squash tennis court[edit]

In 1910 the NSTA adopted a standard court size of 17 by 32.5 feet (5.2 by 9.9 m). Although many of these were built in the New York area, after play was authorized on a N. American squash court they began to disappear. It did not make economic sense to maintain a specialty court when a more versatile one was acceptable.

International squash court[edit]

An International squash court is 21 by 32 feet (6.4 by 9.8 m). The additional lines will need to be added. The extra width of the court makes the various multi-walled shots more difficult or impossible, so experienced players prefer to use a N. American court. However, a 21-foot (6.4 m) court is often the only one generally available, particularly outside North America.

Non-standard courts[edit]

Originally the game was played on a racquets court, then on fives courts. Before 1911 there were no standards for court size, and ones constructed specifically for squash tennis varied from each other somewhat. They were constructed at private estates and clubs. At least one of these courts survives today in a playable condition. The court at Plum Orchard was fully restored in 2008 with the tins in place and working electric lights. It was added to George Lauder Carnegie's "Plum Orchard" estate on Cumberland Island, Georgia, in the winter of 1903/04, and is now owned by the National Park Service. An exhibit on squash tennis history has recently been installed in the mansion, which is occasionally open for public tours.

Table tennis, also known as ping pong, is a sport in which two or four players hit a lightweight ball back and forth across a table using a small, round bat. The table is kind of in the shape of a quadrant.

when serving you have to hit the ball into the opposite quadrant which you are standing.

Radio-controlled aerobatics is the practice of flying radio-controlled aircraft in maneuvers involving aircraft attitudes that are not used in normal flight. Four-point roll[edit] The four-point roll is a quick series of quarter rolls. The pilot gives four separate, but very brief aileron inputs. The first rolls the aircraft to knife-edge, the second rolls the aircraft inverted, the third rolls the aircraft to opposite knife-edge, and the final input rolls the aircraft back to upright. Rolling circle[edit] Control stick inputs for the rolling circle (left-turning right-rolling), showing the typical amount of elevator and rudder input as a function of rolling position. Rolling circle is a maneuver in which an aircraft rolls continuously while turning in a circle. This is arguably one of the most difficult maneuvers to perfect, since varying pitch and yaw corrections are necessary to keep the heading level while maintaining constant roll rate and turning radius. The standard rolling circle involves 1 roll at each quadrant of the turn, resulting in a total of 4 rolls throughout the 360° horizontal turn. The most logical method to approach the rolling circle is to think of it as 4 slow rolls with turn. The procedure below describes a left-turning right-rolling quadrant

Four-wheel drive, 4×4 ("four by four"), 4WD, and AWD is a form of drivetrain most commonly capable of providing power to all wheel ends of a two-axled vehicle simultaneously. It may be full-time or on-demand, and may be linked via a transfer case to provide multiple gear ranges. A four-wheeled vehicle with power supplied to both axles may be described as "all-wheel drive". However, not all "four-wheel drive" vehicles are "all-wheel drive", as vehicles with more than two axles may also be described as "four-wheel drive" regardless of how many axles, so long as two axles (of two wheel ends apiece) are powered.[ 4WD/AWD systems were developed in many different markets and used in many different vehicle platforms. There is no universally accepted set of terminology to describe the various architectures and functions.[2] The terms used by various manufactures often reflect marketing rather than engineering considerations or significant technical differences between systems.[3][4] 4×4[edit] Four-by-four (4×4) refers to the general class of vehicles. The first figure is normally the total wheels (more precisely, axle ends, which may have multiple wheels), and the second, the number that are powered. Syntactically, 4×2 means a four-wheel vehicle that transmits engine power to only two axle-ends: the front two in front-wheel drive or the rear two in rear-wheel drive.[5] Alternatively, a 6x4 vehicle has three axles, any two of which provide power to two wheel ends each. The number of wheels may be greater than six, as on ubiquitous ten-wheel tractor units, but the designation stays the same.[1] 4WD[edit] Four wheel drive (4WD) refers to vehicles with two or more axles providing power to four wheel ends.[1] In the North American market the term generally refers a system that is optimized for severe off-road driving situations.[6] Four-wheel drive vehicles typically have a transfer case, which locks the front and rear axles, meaning that the front and rear drive shafts will be locked together when engaged. This provides maximum torque transfer to the axle with the most traction, but can cause binding in high traction turning situations.[7] AWD[edit] Main article: AWD (vehicle) All wheel drive (AWD) historically was synonymous with "four-wheel drive" on four-wheeled vehicles, and six-wheel drive on 6x6s, and so on, being used in that fashion at least as early as the 1920s.[8][9] Today in the United States the term is applied to both heavy vehicles as well as light passenger vehicles. When referring to heavy vehicles the term is increasingly applied to mean "permanent multiple-wheel drive" on 2×2, 4×4, 6×6 or 8×8 drive train systems that include a differential between the front and rear drive shafts.[10] This is often coupled with some sort of anti-slip technology, increasingly hydraulic-based, that allows differentials to spin at different speeds but still be capable of transferring torque from a wheel with poor traction to one with better. Typical AWD systems work well on all surfaces, but are not intended for all consumers.[10] When used to describe AWD systems in light passenger vehicles it describes a system that applies power to all four wheels and targeted as improving on road traction and performance, particularly in inclement conditions, rather than for off road applications.[6] Some all wheel drive electric vehicles solve this challenge using one motor for each axle, thereby eliminating a mechanical differential between the front and rear axles. An example of this is the dual motor variant of the Tesla Model S, which on a millisecond scale can control the power distribution electronically between its two motors.[11] IWD[edit] Individual-wheel drive (IWD) was coined to identify those electric vehicles whereby each wheel is driven by its own individual electric motor. This system essentially has inherent characteristics that would be generally attributed to four-wheel drive systems like the distribution of the available power to the wheels. However, because of the inherent characteristics of electric motors, torque can be negative, as seen in the Rimac Concept One and SLS AMG Electric. This can have drastic effects, as in better handling in tight corners.[12] The term IWD can refer to a vehicle with any number of wheels. For example, the mars rovers are 6-wheel IWD.

An astride position (the vaulter sits on the horse as a rider would), with the arms held to the side and the hands raised to ear level. Hands should be held with closed fingers and palms facing downward, with the fingers arching slightly upward. Legs are wrapped around the horse's barrel, soles facing rearward, with toes down and feet arched. Vaulter holds this position for four full strides.

From the astride position, the vaulter hops to his or her knees and extends the right leg straight out behind, holding it slightly above his or her head so the leg is parallel to the horse's spine. The other leg should have pressure distributed through the shin and foot, most weight should be on the back of the ankle, to avoid digging the knee into the horse's back. The left arm is then stretched straight forward, at a height nearly that of the right leg. The hand should be held as it is in basic seat (palm down, fingers together). The right foot should be arched and the sole should face skyward. This movement should be held for four full strides after the arm and leg are raised.

From the astride position, the vaulter brings the right leg over the horse's neck. The grips must be ungrasped and retaken as the leg is brought over. The left leg is then brought in a full arc over the croup, again with a change of grips, before the right leg follows it, and the left leg moves over the neck to complete the full turn of the vaulter. The vaulter performs each leg movement in four strides each, completing the Mill movement in sixteen full strides. During the leg passes, the legs should be held perfectly straight, with the toes pointed. When the legs are on the same side of the horse, they should be pressed together.

The 16 strides are the 16 squares of the quadrant model

The vaulter moves from the astride position onto the shins and immediately onto both feet, and releases the grips. The vaulter then straightens up with both knees bent, the buttocks tucked forward, and the hands held as they are in basic seat. The vaulter must hold the position for four full strides

Four-ball billiards (often abbreviated to simply four-ball, and sometimes spelled 4-ball or fourball) is a carom billiards game, played on a pocketless table with four billiard balls, usually two red and two white, one of the latter with a spot to distinguish it (in some sets, one of the white balls is yellow instead of spotted). Each player is assigned one of the white (or yellow) balls as a cue ball. A point is scored when a shooter's cue ball caroms on any two other balls in the same shot (with the opponent's cue ball serving as an object ball, along with the reds, for the shooter). Two points are scored when the shooter caroms on each of the three object balls in a single shot.[1] A carom on only one ball results in no points, and ends the shooter's inning. A variant of four-ball is the East Asian game yotsudama (四つ球?, Japanese for 'four balls'), or sagu (사구, Korean for 'four balls').

Bat and trap is an English bat-and-ball pub game. It is still played in Kent, and occasionally in Brighton. By the late 20th century it was usually only played on Good Friday in Brighton, on the park called The Level, which has an adjacent pub called The Bat and Ball, whose sign depicts the game. Brighton & Hove City Council plans to start a Bat and Trap club based at The Level in 2013, as part of the Activities Plan associated with a £2.2m Heritage Lottery Fund and Big Lottery Fund-funded restoration of the park. www.brighton-hove.gov.uk/thelevel In the American rules of bat and trap, there are several differences in the equipment and game mechanics as well as the layout of the pitch. Each team is limited to 4 players. The trap is 6 inches by 6 inches, and it has a yellow background with a black "X" mark across the front. The posts are 1-2 feet high. There are two additional lines, one of which extends across the field at a right angle 10 yards in front of the trap; this line is the "foul line". Balls put into play must not touch the ground prior to hitting this line or the batter is called out. In addition, there is an additional line 5 yards behind the posts; this line is known as the "back line", and fair hit balls that cross the line, either before touching a fielder or after, or on the ground or in the air but below the imaginary line demarcating the fair zone, score 4 runs for the batting side. This is known as a "four", and the fielding team does not have the opportunity to roll out the batter following a four. Since the posts are only 1-2 feet, the top of the fair hit zone is demarcated by an imaginary line running from the top of the tallest fielding player's head. Batted balls that travel above this imaginary line are automatically out.

An X is a quadrant

British baseball has four bases but a home run is worth four points

Brännboll is a form of baseball in Norway with four bases. There is no pitcher as the hitter throws the ball in the air and then hits it. Generic penalty system (Several varieties exist) First time – warning. Second time – 5 penalty points. Third time – 10 penalty points. Fourth time – disqualification, the opponent wins.

The forth square is always death. The first square is always good.

Corkball is a "mini-baseball" game featuring a 1.6-ounce (45 g) ball, which is stitched and resembles a miniature baseball. The bat has a barrel that measures 1.5 inches (3.8 cm) in diameter. Originally played on the streets and alleys of St. Louis, Missouri as early as 1890,[1] today the game has leagues formed around the country as a result of St. Louis servicemen introducing the game to their buddies during World War II and the Korean War. It has many of the features of baseball, yet can be played in a very small area because there is no base-running. It also has four bases.

Kickball is a playground game and league game, similar to baseball, invented in the United States in the first half of the 20th century. It has four bases

Rounders (Irish: cluiche corr) is a bat-and-ball game played between two teams. Rounders is a striking and fielding team game that involves hitting a small, hard, leather-cased ball with a rounded end wooden, plastic or metal bat. The players score by running around the four bases on the field.[1][2] The game is popular among Irish and British school children. The game also has four bases.

The Massachusetts Game was a type of amateur club baseball popular in 19th century New England. It was an organized and codified version of local games called "base" or "round ball", and related to town ball and rounders. The Massachusetts Game is remembered as a rival of the New York Game of baseball, which was based on Knickerbocker Rules. In the end, however, it was the New York style of play which was adopted as the "National Game" and was the fore-runner of modern baseball. It also has four bases

Oină (Romanian pronunciation: [ˈoj.nə]) is a Romanian traditional sport, similar in many ways to baseball and lapta.

The attacking side player that has commenced a run will have to cross the following four lines in order:

the start line (the left side of the batting line)

the arrival line (the left side of the back line)

the return line (the right side of the back line)

the escape line (the right side of the batting line)

Old cat (also known as ol' cat or cat-ball) games were bat-and-ball, safe haven games played in North America The games were numbered according to the number of bases. The number of bases varied according to the number of players. Three old cat had a triangular base layout and three strikers, while four old cat had four strikers and four bases in a square pattern. The Mills Commission, formed in 1905 to ascertain the origins of baseball, recorded many reminiscences of people playing three and four old cat in their youth. Baseball historian Harold Seymour reported that old cat games were still being played on the streets and vacant lots of Brooklyn in the 1920s. Albert Spalding suggested that four old cat was the immediate ancestor of town ball, from which baseball evolved.

Pesäpallo (Finnish pronunciation: [pesæpɑlːo]; Swedish: boboll, both names literally meaning "nest ball", also referred to as "Finnish baseball") is a fast-moving bat-and-ball sport that is quite often referred to as the national sport of Finland and has some presence in other countries including Germany, Sweden, Switzerland, Australia, and Canada's northern Ontario (the latter two countries have significant Scandinavian populations.) The game is similar to brännboll, rounders, and lapta, as well as baseball. The game has four bases

The "Core Four" are the former New York Yankees baseball players Derek Jeter, Andy Pettitte, Jorge Posada, and Mariano Rivera. All four players were drafted or originally signed as amateurs by the Yankees in the early 1990s. They played together in the minor leagues, and made their Yankee major league debuts in 1995. Each of them was a key contributor to the Yankees' late-1990s dynasty that won four World Series championships in five years. By 2007, they were the only remaining Yankees from the franchise's dynasty of the previous decade. All four players were on the Yankees' active roster in 2009 when the team won the 2009 World Series—its fifth championship in the previous 14 years. Three members of the Core Four—Jeter, Rivera and Posada—played together for 17 consecutive years (1995–2011), longer than any other similar group in North American professional sports.[1] Pettitte had a sojourn away from the team when he played for the Houston Astros for three seasons, before returning to the Yankees in 2007. He retired after the 2010 season,[2] reducing the group to the so-called Key Three.[3] Posada followed suit after 2011, ending his 17-year career with the Yankees.[4] Pettitte came out of retirement prior to the 2012 season and played for two more years.[5] Both Pettitte and Rivera retired after the 2013 season, and Jeter retired after the 2014 season.[6]

There are four swim strokes in swim racing. The forth one is butterfly. It is the forth transcendnet one that is different.

There are four styles of butterfly stroke. Two main styles of butterfly stroke seen today are: "arm pull up simultaneous with dolphin kick" and "arm pull down simultaneous with dolphin kick".[14] "Arm pull up simultaneous with dolphin kick": After head goes underwater, both arms go underwater but still higher than head. After first dolphin kick, pull both arms immediately with downward motion. While pulling arms, legs are relaxed, both knees and waist are slightly bent to prepare dolphin kick. After arms push water backward, pull arms up simultaneous with dolphin kick. In this style, turning point from drowning to floating is at the time of downward arm motion. "Arm pull down simultaneous with dolphin kick": After head goes underwater, both arms go underwater until lower than head. After first dolphin kick, raise both arms with relax. While rising arms, bend both knees and waist to send body back to the surface and prepare dolphin kick. Pull both arms downward while executing dolphin kick. After this sequence, immediately push the water backward. In this style, turning point from drowning to floating is at the time of waist bend. Two additional styles of butterfly stroke is similar with two styles above, but without "second" dolphin kick [15] in order to save energy and be more relaxed.

There are four basic swimming stokes: crawl (also known as freestyle), backstroke, breaststroke, and butterfly. Swimming Stroke # 1 – The Crawl, or Freestyle The technique involved in this swimming stroke is pretty simple. You float on your belly in the water, and propel yourself by rotating your arms in a windmill motion, and kick your legs in a fluttering motion. The hardest part of this swimming technique is the coordination of the breathing while performing the strokes, since the face remains in the water almost all the time. Swimming Stroke # 2 – The Backstroke The backstroke is akin to the crawl, except that you float on your back in the water. The arms are moved in a similar alternating windmill motion, and the legs a kicked in a similarly fluttering motion. The two basic techniques of a correct backstroke are: One, that the arms are moved with equal force, or else you will find yourself swimming off towards one side; Two, that the body should be rolled from one side to the other, so that the arms extend to their utmost reach, to propel you by catching enough water. Swimming Stroke # 3 – The Breaststroke This swimming technique involves a pattern wherein the body bobs upwards and downwards as you propel yourself forward in the water. The breaststroke is a difficult swimming technique, and should not be chosen if you are just beginning to learn swimming. Basically, this swimming stroke involves pulling your arms through the water, as you bob up and breathe, and then kicking with your legs as you bob down and glide forward. The arm pulling and the leg kicking are done alternatively. Swimming Stroke # 4 – The Butterfly Stroke Similar to the breaststroke, the butterfly is also a difficult swimming technique, and not advocated for beginning learners, since it involves a fair amount of strength as well as precise timing. While performing this stroke, the legs should be moved together akin to the movements of a dolphin’s tail, the arms should also be moved together, pushing the water downwards and then backwards, while the torso moves forward in an undulating manner.

Medley is a combination of four different swimming styles —Butterfly, Backstroke, Breaststroke, and Freestyle— into one race. This race is either swum by one swimmer as individual medley (IM) or by four swimmers as a medley relay. Individual medley consists of four strokes. Usually each stroke has an equal part of the overall distance, i.e. 1/4 of the overall distance is swam in one stroke. The strokes are swam in this order:[1] Butterfly Backstroke Breaststroke Freestyle, any stroke except backstroke, breaststroke, or butterfly.[2] Most swimmers use the front crawl. Competitions[edit] There are a number of competitions swum regularly in individual medley, by both men and women. The competitions are limited in that every distance must consist of at least 4 lengths (100 yd. or m.) or a multiple of 4 lengths (200 or 400 yd. or m.), so that no stroke must change mid-length. Regardless of the length of the individual medley, each stroke comprises a quarter of the overall distance. 100 m/yd individual medley: Swum in short course (25 m/yd pool) competition only. This is not an Olympic event. 200 m/yd individual medley: Swum in both short course and long course (50 m pool) competitions. This was swum an Olympic event in the 1968 Summer Olympics, Mexico City, Mexico but then was not swam again at the Olympic Games until the 1984 Summer Olympics, Los Angeles, United States. The event has been swum ever since. 400 m individual medley: Swum in both short course and long course competitions. This has been an Olympic event since the 1964 Summer Olympics, Tokyo, Japan

You might have heard of something called Front Quadrant Swimming which has to do with the timing of your freestyle stroke. It's widely recognised as being an efficient way to swim and something that you should use in your own stroke technique but there's a lot of confusion about what it actually means: If you drew two lines, one through the swimmer's head and one at water level you would create four quadrants: Front quadrant swimming simply means that there is always one of your hands in one of the front quadrants (1 and 2) at any one point in time. Or, put even more simply, when your hands pass above and below the water, that should happen in front of your head, not behind it.

In individual medley events, the swimmer covers the four swimming styles in the following order: butterfly, backstroke, breaststroke and freestyle. In medley relay events, swimmers will cover the four swimming styles in the following order: backstroke, breaststroke, butterfly and freestyle. Each section must be finished in accordance with the rule which applies to the style concerned.

The front crawl or forward crawl, also known as the American crawl, is a swimming stroke usually regarded as the fastest of the four front primary strokes.[1] As such, the front crawl stroke is nearly universally used during a freestyle swimming competition, hence freestyle is used metonymically for the front crawl. It is one of two long axis strokes, the other one being the backstroke. Unlike the backstroke, the butterfly stroke, and the breaststroke, the front crawl is not regulated by the FINA. This style is sometimes referred to as the Australian crawl although this can sometimes refer to a more specific variant of front crawl.

The "front crawl" style has been in use since ancient times. There is an Egyptian bas relief piece dating to 2000 BCE showing it in use.

The arm movements of the front crawl provide most of the forward motion. The arms alternate from side to side, so while one arm is pulling and pushing under the water, the other arm is recovering above the water. The move can be separated into four parts: the downsweep, the insweep, the upsweep, and the recovery.[9] Each complete arm movement is referred to as a stroke; one stroke with each arm forms a stroke cycle.

A quadrathlon (or quadriathlon) is an endurance sports event composed of four individual disciplines. All four disciplines are completed in succession and the lowest overall time decides the winner. The World Quadrathlon Federation defines that a quadrathlon consists of Sprint Distance Middle Distance Long Distance swimming 0.75 kilometers 1.5 km 4 km kayaking 4 km 8 km 20 km cycling 20 km 40 km 100 km running 5 km 10 km 21 km in any order, though usually as above. The distances, time duration and events depending on the organizing body, the location of the event and the time of year. During the winter months snowshoes and cross country skiing may replace running and swimming respectively. In Great Britain, the governing body is the British Quadrathlon Association (BQA). The World Quadrathlon Federation has stated aim is to provide and promote International awareness for the sport of Quadrathlon. "Quadrathlon adds flatwater kayaking to the sport of triathlon to create a balanced test of fitness."

Sprint kayak is a sport held on calm water. Crews or individuals race over 200 m, 500 m, 1000 m or 5000 m with the winning boat being the first to cross the finish line. The paddler is seated, facing forward, and uses a double-bladed paddle pulling the blade through the water on alternate sides to propel the boat forward. In competition the number of paddlers within a boat is indicated by a figure besides the type of boat; K1 signifies an individual kayak race, K2 pairs, and K4 four-person crews. Kayak sprint has been in every summer olympics since it debuted at the 1936 summer olympics.[8] racing is governed by the International Canoe Federation.

Surf kayaking comes in two main varieties, High Performance (HP) and International Class (IC). HP boats tend to have a lot of nose rocker, little to no tail rocker, flat hulls, sharp rails and up to four fins set up as either a three fin thruster or a quad fin

Sprint canoe is also known as flatwater racing. The paddler kneels on one knee, and uses a single-blade paddle.[37] Canoes have no rudder, so the boat must be steered by the athlete’s paddle using a j-stroke. Canoes may be entirely open or be partly covered. The minimum length of the opening on a C1 is 280 cm (110 in). Boats are long and streamlined with a narrow beam, which makes them very unstable. A C4 can be up to 9 m (30 ft) long and weigh 30 kg (66 lb).[38] ICF classes include C1 (solo), C2 (crew of two), and C4 (crew of four). Race distances at the 2012 Olympic Games were 200 and 1000 meters.

There are a number of speciality surf kayak designs available. They are often equipped with up to four fins with a three fin thruster set up being the most common.

Finswimming is an underwater sport consisting of four techniques involving swimming with the use of fins either on the water's surface using a snorkel with either monofins or bifins (i.e. one fin for each foot) or underwater with monofin either by holding one's breath or using open circuit scuba diving equipment

A powerlifting competition takes place as follows: Each competitor is allowed three to four attempts on each of the squat, bench press, and deadlift, depending on their standing and the organization they are lifting in. The lifter’s best valid attempt on each lift counts toward the competition total. For each weightclass, the lifter with the highest total wins. If two or more lifters achieve the same total, the lighter lifter ranks above the heavier lifter.

Cinema

In the movie industry, a four-quadrant movie is one which appeals to all four major demographic "quadrants" of the moviegoing audience: both male and female, and both over- and under-25s.[1] Films are generally aimed at at least two such quadrants, and most tent-pole films are four-quadrant movies. A film's budget is often correlated to the number of quadrants the film is expected to reach, and movies are rarely produced which are aimed at fewer than two quadrants.[2] Although four-quadrant movies are generally family-friendly, this is not a requirement.[3] Some other genres meeting this may be romantic (such as Titanic and Meet the Parents) or horror films (The Exorcist), or be crowd-pleasing in nature.[4][5] Four-quadrant movies often have both adult and child protagonists.[6] They are often built on a "high-concept" premise with well-delineated heroes and villains, with emotion, action and danger present in the story.[7]

In the movie Elf, an elf says "Then YES! We elves try to stick to the four main food groups: candy, candy canes, candy corns, and syrup."

The Four Musketeers, (French: Les Quatre Mousquetaires) after a popular 1920s film adaptation of Alexandre Dumas' classic,[1] were French tennis players who dominated the game in the second half of the 1920s and early 1930s, winning 20 Grand Slam titles and 23 Grand Slam doubles.[2][3] They also led France to six straight Davis Cup wins, 1927-32, in an era when Cup matches enjoyed a prestige similar to today's FIFA World Cup finals. At its creation in 1927, Tournoi de Roland-Garros's trophy was named the Coupe des Mousquetaires in honour of the quartet.[1] The Musketeers were: Jean Borotra (1898–1994) [4][5] Jacques Brugnon (1895–1978) [6] Henri Cochet (1901–1987) [7] René Lacoste (1904–1996) [

The Four Musketeers (also known as The Four Musketeers: Milady's Revenge) is a 1974 Richard Lester film that is a sequel to The Three Musketeers, and covers the second half of Dumas' novel The Three Musketeers. Fifteen years later, the cast and crew returned to film The Return of the Musketeers, loosely based on Dumas' Twenty Years After.

The hangover was an enormously popular movie that had sequels because.. It tells the story of Phil Wenneck (Cooper), Stu Price (Helms), and Alan Garner (Galifianakis), who travel to Las Vegas for a bachelor party to celebrate their friend Doug Billings' (Bartha) impending marriage. However, Phil, Stu, and Alan have no memory of the previous night's events and must find Doug before the wedding can take place. The quadrant model pattern is there are four parts and the fourth is usually transcendent. In this movie the fourth friend Doug is missing and the other three are trying to find him

World of warcraft is considered today one of the most popular games

To enter the game, the player must select a server, referred to in-game as a realm. Each realm acts as an individual copy of the game world, and falls into one of four categories. Available realms types are:

Normal – a player versus environment (PvE) realm where the gameplay is more focused on defeating monsters and completing quests, player-versus-player fights must be consensual, and any roleplay is optional.

PvP – an environment where, in addition to defeating monsters and completing quests, open player-versus-player combat is the norm, and a player can be attacked by an opposing faction's player at any time.

RP – a variant of PvE, where players roleplay in-character.

RP-PvP – roleplay-PvP – a variant of PvP, where players are in-character and cross-faction combat is assumed.

4X is a genre of strategy-based video and board games in which players control an empire and "eXplore, eXpand, eXploit, and eXterminate". The term was first coined by Alan Emrich in his September 1993 preview of Master of Orion for Computer Gaming World.[1] Since then, others have adopted the term to describe games of similar scope and design. 4X computer games are noted for their deep, complex gameplay. Emphasis is placed upon economic and technological development, as well as a range of non-military routes to supremacy. Games can take a long time to complete since the amount of micromanagement needed to sustain an empire scales as the empire grows. 4X games are sometimes criticized for becoming tedious for these reasons, and several games have attempted to address these concerns by limiting micromanagement, with varying degrees of success. The earliest 4X games borrowed ideas from board games and 1970s text-based computer games. The first 4X computer games were turn-based, but real-time 4X games are not uncommon. Many 4X computer games were published in the mid-1990s, but were later outsold by other types of strategy games. Sid Meier's Civilization is an important example from this formative era, and popularized the level of detail that later became a staple of the genre. In the new millennium, several 4X releases have become critically and commercially successful. In the board (and card) game domain, 4X is less of a distinct genre, in part because of the practical constraints of components and playing time. The Civilization board game that gave rise to Sid Meier's Civilization computer game, for instance, has no exploration and no extermination. Unless extermination is targeted at non-player entities, it tends to be either nearly impossible (because of play balance mechanisms, since player elimination is usually considered an undesirable feature) or certainly unachievable (because victory conditions are triggered before extermination can be completed) in board games.

The player controls Pac-Man through a maze, eating pac-dots (also called pellets or just dots). When all pac-dots are eaten, Pac-Man is taken to the next stage. Between some stages one of three intermission animations plays.[22] Four enemies (Blinky, Pinky, Inky and Clyde) roam the maze, trying to catch Pac-Man. If an enemy touches Pac-Man, a life is lost and Pac-Man himself withers and dies. The interesting thing is the four enemies are red blue green and yellow and three of them start in the box and the fourth starts out (the fourth is always different from the lrevious three). Pac man is one of the most popular video games of all time and reflects the quadrant model image

In pac man near the corners of the maze are four larger, flashing dots known as power pellets that provide Pac-Man with the temporary ability to eat the enemies. The enemies turn deep blue, reverse direction and usually move more slowly. When an enemy is eaten, its eyes remain and return to the center box where it is regenerated in its normal color. Blue enemies flash white to signal that they are about to become dangerous again and the length of time for which the enemies remain vulnerable varies from one stage to the next, generally becoming shorter as the game progresses. In later stages, the enemies go straight to flashing, bypassing blue, which means that they can only be eaten for a short amount of time, although they still reverse direction when a power pellet is eaten; in even later stages, the ghosts do not become edible (i.e., they do not change color and still make Pacman lose a life on contact), but they still reverse direction

There are four enemies in pac man and their characteristics fulfill the quadrant pattern.

The enemies in Pac-Man are known variously as "ghosts," "goblins," "demon," "octopi" and "monsters".[24][25][26] Despite the seemingly random nature of the enemies, their movements are strictly deterministic, which players have used to their advantage. In an interview, creator Toru Iwatani stated that he had designed each enemy with its own distinct personality in order to keep the game from becoming impossibly difficult or boring to play.[27] More recently, Iwatani described the enemy behaviors in more detail at the 2011 Game Developers Conference. He stated that the red enemy chases Pac-Man, and the pink and blue enemies try to position themselves in front of Pac-Man's mouth.[28] Although he claimed that the orange enemy's behavior is random, a careful analysis of the game's code reveals that it actually chases Pac-Man most of the time, but also moves toward the lower-left corner of the maze when it gets too close to Pac-Man. The term "ghosts" originates from the failed Atari 2600 port. Technical limitations caused the villans to flicker, and the game's manual dubbed them "ghosts" so as to cover up the flaw. Although the game was ultimately unsuccessful due to these flaws, the term stuck, and soon spread to all of the bubble gum cards, stickers, and other merchandise released afterwards. In the Japanese cabinet art and flyers, the villains appeared somewhat like sheeted ghosts. These became the basis for most drawings on the various merchandise. Consequently, cabinet artwork for later arcade games depicted the villans as more ghost-like.[29] Enemy Color Puck Man (Original)[30] Pac-Man (American) Character Translation Nickname Translation Alternate character Alternate nickname Character Nickname Red Oikake (追いかけ) chaser Akabei (アカベイ) red guy Urchin Macky Shadow Blinky Pink Machibuse (待ち伏せ) ambusher Pinky (ピンキー) pink guy Romp Micky Speedy Pinky Cyan Kimagure (気まぐれ) fickle Aosuke (アオスケ) blue guy Stylist Mucky Bashful Inky Orange Otoboke (お惚け) feigning ignorance Enemies: Eating all four enemies in the invisible time provided by one power pellet give you 3,000 points. (200 for the first enemy, 400 for the second enemy, 800 for the third enemy, and 1600 for the fourth enemy.) You can do this four times per level, in level 1 to level 16 and level 18. These give you 3000*4*17=204,000 points. Pacman is said to be the most popular video game of all time, in arcades everywhere and it is said to be the foundation of all other video games becsuse they copy from its basic premose. For instance in grand theft auto you are chased by the police like pac man is chased

Arimaa is played in quadrants Arimaa is played on an 8×8 board with four trap squares. After the pieces are placed on the board, the players alternate turns, starting with Gold. A turn consists of making one to four steps

Chess is believed to have originated in Eastern India, c. 280 – 550,[28] in the Gupta Empire,[29][30][31][32] where its early form in the 6th century was known as chaturaṅga (Sanskrit: चतुरङ्ग), literally four divisions [of the military] – infantry, cavalry, elephants, and chariotry, represented by the pieces that would evolve into the modern pawn, knight, bishop, and rook, respectively.

the International Mathematical Union (IMU) adopted a new logo, on the 22 August 2006 at the opening ceremony of the International Congress of Mathematicians (ICM 2006) in Madrid. It was the winner of an international competition announced by the IMU in 2004. The logo was designed by John Sullivan, Professor of Mathematical Visualization at the Technical University of Berlin (TU Berlin) and at the DFG Research Center MATHEON, and adjunct professor at the University of Illinois, Urbana (UIUC), with help from Prof. Nancy Wrinkle of Northeastern Illinois University. The winning logo design above was based on the Borromean rings, a famous topological link of three components. The rings have the surprising property that if any one component is removed, the other two can fall apart (while all three together remain linked). This so-called Brunnian property has led the rings to be used over many centuries in many cultures as a symbol of interconnectedness, or of strength in unity. Although the Borromean rings are most often drawn as if made from three round circles, such a construction is mathematically impossible. The IMU logo instead uses the tight shape of the Borromean rings, as would be obtained by tying them in rope pulled as tight as possible. Mathematically, this is the length-minimizing configuration of the link subject to the constraint that unit-diameter tubes around the three components stay disjoint. This problem and its solution are described in the paper Criticality for the Gehring Link Problem by J.Cantarella, J.Fu, R.Kusner, J.Sullivan, N.Wrinkle, Geometry and Topology 10 (2006) The Borromean ring has a kind of quadrant (four section) aspect to it with its crossings.

Yochai Bencher states in his book the "Four Quadrants of Evolutionary Intelligence  PREFACES I put the above diagram together in the early 1990’s as I struggled with the contradiction between how much money the US Government was spending on information technology across all agencies, and on stealing information within the secret world, in both cases, having little to show and no sense-making. Business Intelligence is generally used as a term for internal data mining viewed through a digital dashboard and is firmly entrenched in Quadrant I. Competitive Intelligence, as represented by the members of the Society of Competitive Intelligence Professionals (SCIP), focuses primarily on the market space and competitors in that market space, rather than on the needs of existing and unknown customers, and the realities of the external world. This group is based in Quadrant II with a narrow focus within Quadrant III. OSS.Net, now a subsidiary of a much larger company, has been in this quadrant for fifteen years. Using a global network of road-runners, retired attaches, graduate students, and locationally well-positioned observers, we have been able to tap into all information in all languages all the time. Neither of these two is the equal of Commercial Intelligence, which fully integrates customers, externalities, exactly the right combination of experts on demand, the right automated sense-making tools, and the customized decision- support, getting the right information to the right person at the right time. It is in Quadrant IV where I believe we can simultaneously achieve Harold L. Wilensky’s vision for Organizational Intelligence (1967) and the complementary visions of each of the authors represented in this book"

A lot of people like to eat waffles. Waffle irons tebd to reflect quadrant images

Str8ts is a logic-based number-placement puzzle, invented by Jeff Widderich in 2008.[1] It is distinct from, but shares some properties and rules with Sudoku. The name is derived from the poker straight. The puzzle is published in a number of newspapers internationally,[2] in 2 book collections, and in downloadable apps. It was featured on the Canadian television show Dragons' Den on November 24, 2010.

It reflexts the quadrant image

Four of a kind, also known as quads, is a poker hand such as 9♣ 9♠ 9♦ 9♥ J♥, that contains all four cards of one rank and any other (unmatched) card. Quads with higher-ranking cards defeat lower-ranking ones. In community-card games (such as Texas Hold 'em) or games with wildcards or multiple decks it is possible for two or more players to obtain the same quad; in this instance, the unmatched card acts as a kicker, so 7♣ 7♠7♦ 7♥ J♥ defeats 7♣ 7♠ 7♦ 7♥ 10♣. If two hands have the same kicker, they tie and the pot is split. In some countries the term Carré is used.

A full house, also known as a full boat, is a hand such as 3♣ 3♠ 3♦ 6♣ 6♥, that contains three matching cards of one rank and two matching cards of another rank. Between two full houses, the one with the higher-ranking three cards in their hand wins, so 7♠ 7♥ 7♦ 4♠ 4♣defeats 6♠ 6♥ 6♦ A♠ A♣. If two hands have the same three cards (possible in wild card and community card games), the hand with the higher pair wins, so 5♥ 5♦ 5♠ Q♥ Q♣ defeats 5♣ 5♦ 5♠ J♠ J♦. Full houses are described as "three full of pair"; Q♣ Q♦ Q♠9♥ 9♣ could be described as "queens full of nines" or simply "queens full". In my opinion this hand really reclects rhe quadrant model pattern because in the quadrant model the first three are very similar, the fourth is different and the fourth points to or indicates the nature of the fifth

The earliest evidence of chess is found in the nearby Sassanid Persia around 600, where the game came to be known by the name chatrang. Chatrang is evoked in three epic romances written in Pahlavi (Middle Persian). Chatrang was taken up by the Muslim world after the Islamic conquest of Persia (633–44), where it was then named shatranj, with the pieces largely retaining their Persian names. In Spanish "shatranj" was rendered as ajedrez ("al-shatranj"), in Portuguese as xadrez, and in Greek as ζατρίκιον (zatrikion, which comes directly from the Persian chatrang),[33] but in the rest of Europe it was replaced by versions of the Persian shāh ("king"), which was familiar as an exclamation and became the English words "check" and "chess"

The Arabic word shatranj is derived from the Sanskrit chaturanga (catuḥ: "four"; anga: "arm").

The rules of chaturanga seen in India today have enormous variation, but all involve four branches (angas) of the army: the horse, the elephant (bishop), the chariot (rook) and the foot soldier (pawn), played on an 8×8 board.

The game was played within quadrants.

Draughts (UK /ˈdrɑːfts/) or checkers[1] (American English) is a group of strategy board games for two players which involve diagonal moves of uniform game pieces and mandatory captures by jumping over opponent pieces. Draughts developed from alquerque.[2] The name derives from the verb to draw or to move. Checkers boards are made up of different color quadrants. A similar game has been played for thousands of years.[3] A board resembling a draughts board was found in Ur dating from 3000 BC.[9] In the British Museum are specimens of ancient Egyptian checkerboards, found with their pieces in burial chambers, and the game was played by Queen Hatasu.[3][10] Plato mentioned a game, πεττεία or petteia, as being of Egyptian origin,[10] and Homer also mentions it.[10] The method of capture was placing two pieces on either side of the opponent's piece. It was said to have been played during the Trojan War.[11][12] The Romans played a derivation of petteia called latrunculi, or the game of the Little Soldiers.[10][13] Alquerque board and setup Alquerque[edit] Main article: Alquerque An Arabic game called Quirkat or al-qirq, with similar play to modern draughts, was played on a 5×5 board. It is mentioned in the 10th century work Kitab al-Aghani.[9] Al qirq was also the name for the game that is now called Nine Men's Morris.[14] Al qirq was brought to Spain by the Moors,[15] where it became known as Alquerque, the Spanish derivation of the Arabic name. The rules are given in the 13th century book Libro de los juegos.[9] In about 1100, probably in the south of France, the game of Alquerque was adapted using backgammon pieces on a chessboard.[16] Each piece was called a "fers", the same name as the chess queen, as the move of the two pieces was the same at the time.[citation needed]

Go (traditional Chinese: 圍棋; simplified Chinese: 围棋; pinyin: wéiqí; Japanese: 囲碁; rōmaji: igo[nb 2]; Korean: 바둑; romaja: baduk[nb 3]; literally: "encircling game") is a board game involving two players, that originated in ancient China more than 2,500 years ago. It was considered one of the four essential arts of a cultured Chinese scholar in antiquity. The earliest written reference to the game is generally recognized as the historical annal Zuo Zhuan[2][3] (c. 4th century BC).[4]

The Go Board was seen by the Japanee to be a microcosm of the cosmos.

THe game board is made up of quadrants.

Players from the four schools (Honinbo, Yasui, Inoue and Hayashi) competed in the annual castle games, played in the presence of the shogun

The four points around a piece in the Go game are called the "four liberties", until one is filled and then it becomes the three liberties and so on and so fourth.

In the history of Go in Japan, the Four Go houses were the four academies of Go instituted, supported, and controlled by the state, at the beginning of the Tokugawa shogunate. At roughly the same time shogi was organised into three houses. Here "house" implies institution run on the recognised lines of the iemoto system common in all Japanese traditional arts. In particular the house head had, in three of the four cases, a name handed down: Inoue Inseki, Yasui Senkaku, Hayashi Monnyu. References to these names therefore mean to the contemporary head of house. The four academies were the Honinbo Go house, Hayashi Go house, Inoue Go house and Yasui house. Theoretically these were on a par, and competed in the official castle games called oshirogo.

Xiangqi (Chinese: 象棋, p Xiàngqí), also called Chinese chess, is a strategy board game for two players. It is one of the most popular board games in China, and is in the same family as Western (or international) chess, chaturanga, shogi, Indian chess and janggi. Besides China and areas with significant ethnic Chinese communities, xiangqi (cờ tướng) is also a popular pastime in Vietnam. It is played in quadrants Most games are played with two and three players. "Four Kingdoms Chess" is also played on a riverless, cross-shaped board, but with four players. Because there are no rivers, elephants may move about the board freely.[24]

Stratego is played on a quadrant board Stratego is a very competitive game and this competition has increased over the years. There are now many Stratego competitions held throughout the world. Competitive Stratego competitions are now held in all four versions of the game. Classic Stratego Competitions in the original game include the "Classic Stratego World Championships", the "Classic Stratego Olympiad" and several National Championships from various different countries. Ultimate Lightning Stratego Competitions in this version include the "Ultimate Lightning World Championships" and the "Ultimate Lightning European Championships". Duel Stratego Competitions in this version now include the "Stratego Duel World Championships," which were held for the first time in August 2009 (Sheffield,England). Stratego Barrage To force decisions in knock-out stages in tournaments, in 1992 Stratego Barrage was developed by Marc Perriëns and Roel Eefting. In this "Quick-Stratego" a setup can be made in one minute and played in 5 minutes. The eight pieces with which Barrage is played are the Flag, the Marshall, the General, 1 Bomb, 1 Miner, 2 Scouts and the Spy. Since 1992 Dutch Championships and since 2000 World Championships in Barrage have been organised. Cambodian Champion is Sor Samedy, Dutch Champion (2014) is Ruben van de Bilt, World Champion (2013) is Tim Slagboom.

Tic tac toe is a very popular game played within quadrants

Quarto is a board game for two players invented by Swiss mathematician Blaise Müller in 1991.[1][2] It is played on a 4×4 board. There are 16 unique pieces, each of which is either: tall or short; red or blue (or a different pair of colors, e.g. light- or dark-stained wood); square or circular; and hollow-top or solid-top. Players take turns choosing a piece which the other player must then place on the board. A player wins by placing a piece on the board which forms a horizontal, vertical, or diagonal row of four pieces, all of which have a common attribute (all short, all circular, etc.). A variant rule included in many editions gives a second way to win by placing four matching pieces in a 2x2 square. Quarto is distinctive in that there is only one set of common pieces, rather than a set for one player and a different set for the other. It is therefore an impartial game. 16 is the squares of the quadrant model

Score Four is a 3-D version of the abstract strategy game Connect Four. It was first sold under the name "Score Four" by Funtastic in 1968. Lakeside issued 4 different versions in the 1970s. Later Hasbro sold the game as "Connect Four Advanced" in the UK. . The object of Score Four is to position four beads of the same color in a straight line on any level or any angle. As in Tic Tac Toe, Score Four strategy centers around forcing a win by making multiple threats simultaneously, while preventing the opponent from doing so.

Sholo Guti is a Checker game like Chess played between 2 players. It is specially famous in Bangladesh and some of the Indian regions. Local people of the village passes their leisure time by playing it. They draw the cort of this game on the ground and uses stones as pawns.[1] Rules of the Game[edit] This game is played between 2 person. Each having 16 Pawns. These pawns can move one step forward on the valid positions of the cort. If a player can cross a pawn of the other side then the player will achieve 1 point. In this way whoever manages to achieve 16 points will be the winner. But winning point could be declared at the beginning of the game. It is played on a quadrant grid. 16 is the number of squares of the quadrant model

Gomoku is an abstract strategy board game. It is played on a quadrant grid.

Chinese checkers is the shape of a two dimensional double tetrahedron Merkaba, or the Star of David.

The Legend of Zelda: A Link to the Past and Four Swords[a] is an action-adventure game co-developed by Nintendo and Capcom and published by Nintendo for the Game Boy Advance. It is the ninth installment in the The Legend of Zelda video game series. There are always four Link characters (differentiated by different colors: green, red, blue and purple) in play, regardless of the number of people playing; "extra" Links are attached to those directly controlled and positioned around the controlling character. Normally, the extra Links follow the player, but players can separate an individual Link and control independently, or put the four Links into formations. These techniques are required to solve puzzles and defeat enemies. Players are encouraged to work together to gather enough Force Gems to empower the Four Sword, and failing to do so by the time the boss is defeated or the dark barrier is reached results in having to go back to the beginning of the stage to collect more. However, once the requisite gems are collected, players are automatically transported to the dark barrier and therefore do not have to repeat the entire stage. The Links eventually save the shrine maidens, retrieve the Dark Mirror, destroy Shadow Link and Vaati, and face Ganon in an ultimate showdown. The Links defeats Ganon and seal him firmly in the Four Sword. Peace returns to Hyrule and the people celebrate as all traces of the evil that plagued Hyrule are vanquished.[3] Link then returns the Four Sword back to its resting pedestal and the Four Links become one again. The nature of the quadrant model is there are four quadrants but they are really all one. Zelda is one of the most popular video games of all time.

Kyudo competitions are full of repetitions of four. Kyudo (弓道 kyūdō?, way of the bow) is the modern Japanese martial art (gendai budō) of archery; kyudo practitioners may be known as Kyudojin, kyūdōjin (弓道人?), experts in Kyudo are referred to as kyūdōka. Kyudo is based on kyūjutsu (art of archery), which originated with the samurai class of feudal Japan.[1] Kyudo is practised by thousands of people worldwide. As of 2005, the International Kyudo Federation had 132,760 graded members. Typically a yugake will be of the three- or four-finger variety. The three fingered version is called a mitsugake, and the four-fingered version is called a yotsugake. Typically the primary reason an archer may choose a stronger glove like the yotsugake is to assist in pulling heavier bows. The Three-finger mitsugake is generally used with bows with a pull below 20 kilograms of draw weight, while the four fingered yotsugake are used with bows with a pull above 20 kilograms. This is only a generalization and many schools differ on which glove to use for their bows and glove use often varies from archer to archer and school to school. While kyudo is primarily viewed as an avenue toward self-improvement, there are often kyudo competitions or tournaments whereby archers practice in a competitive style. These tournaments often involve kyūdōka from all ranks and grades, including high school, college and adult schools. Competition is usually held with a great deal more ceremony than the standard dojo practice. In addition to the hassetsu, the archer must also perform an elaborate entering procedure whereby the archer will join up to four other archers to enter the dojo, bow to the adjudicators, step up to the back line known as the honza and then kneel in a form of sitting known as kiza. The archers then bow to the mato in unison, stand, and take three steps forward to the shai line (shooting line), and kneel again. The archers then move in lock-step fashion through the hassetsu, each archer standing and shooting one after another at the respective targets, kneeling between each shot, until they have exhausted their supply of arrows (generally four). In Japanese kyudo competition, an archer shoots four arrows in two sets, placing one pair of arrows at his feet and retaining the second pair at the ready. He first shoots the haya clasping the otoya tightly with his glove hand's one or two last fingers. He then waits until the other archers shoot, then he sets the otoya and shoots. Once all the archers have shot, the archer will then pick up the second pair of arrows at his feet and repeat the process, starting with the second flight's haya. During normal competition, this process is done with the archers standing, however, the complete shooting procedure includes having the archer kneel in kiza while waiting between each shot. For each hit on the mato, the archer is awarded a "maru" (circle) mark. For each miss, the archer is awarded a "batsu" (X) mark. The goal is to strike the target with all four arrows.

The object of popinjay is to knock artificial birds off their perches. The perches are cross-pieces on top of a 90-foot (27 m) mast. The "cock" (the largest bird) is set on the top cross piece. Four smaller "hens" are set on the next crosspiece down. Two dozen or so "chicks" (the smallest birds) are set on the lower cross pieces. (GNAS, 2006 - rule 1000)

SlamBall is a form of basketball played with four trampolines in front of each net and boards around the court edge. The name SlamBall is the trademark of SlamBall, LLC.

Quidditch[2] is a sport of two teams of seven players each mounted on broomsticks played on a hockey rink-sized pitch.[ There are four positions in quidditch Chasers are responsible for passing the quaffle and scoring points by throwing the quaffle through one of the opponent's goals for 10 points. When a bludger hits a chaser in possession of the quaffle, they must drop the quaffle, remove the broom from between their legs, and touch their own hoops to rejoin play. Chasers not in possession of the quaffle must perform the same knockout procedure when hit by a bludger, but do not have a ball to drop. Chasers may enter into physical contact with opposing chasers or keepers. There are three chasers on the field for each team, identified by a white headband. Keepers can be likened to goalies in other sports, and must try to block attempts to score by the opposing team's chasers. The keeper is invulnerable to bludgers as well as having indisputable possession of the quaffle when within their team's keeper zone, an area around the team's hoops. Once outside of the keeper zone, the keeper may serve as a fourth chaser. Keepers may enter into physical contact with opposing keepers or chasers. There is one keeper on the field for each team, identified by a green headband. Beaters attempt to hit the opposing team's players with bludgers and attempt to block the bludgers from hitting their team's players. Beaters are subject to the same knockout procedure as chasers or keepers when hit with a bludger, but unlike chasers and keepers, they may attempt to catch a bludger thrown at them. If they succeed in catching a bludger, they are not knocked out, and the beater who threw the bludger may remain in play. As there are three bludgers for the four beaters on the pitch, the fourth, bludger-less beater puts pressure on the team in control of both bludgers (often called "bludger control" or "bludger supremacy"). Beaters may enter into physical contact only with other beaters. Two beaters on a team may be in play at a time, identified by black headbands. Seekers attempt to catch the snitch. They may not contact the snitch, but are permitted to contact the other seeker. Seekers are released after 18 minutes of game time. There is one seeker on the field for each team, identified by a gold or yellow headband.

In quiddich each match begins with the seven starting players along the starting line within their keeper zone with brooms on the ground and their eyes closed (so as to not watch where the snitch goes) and the four balls lined in the centre of the pitch.

Since its inception, quidditch has sought gender equality on the pitch.[54] One of the most important requirements within the sport is its 'four maximum' rule: A quidditch game allows each team to have a maximum of four players, not including the seeker, who identify as the same gender in active play on the field at the same time. The gender that a player identifies with is considered to be that player’s gender, which may or may not correspond with that person’s sex. This is commonly referred to as the "four maximum" rule. USQ accepts those who don’t identify within the binary gender system and acknowledges that not all of our players identify as male or female. USQ welcomes people of all identities and genders into our league. — US Quidditch, Four Maximum Rule

What are Four-Quadrant Operations? Before beginning our discussion on how a DC motor works in 4 quadrants, we will look at the four quadrant operation of a motor driving a hoist load as shown in figure below. This hoist consists of a cage with or without any load. A rope, generally made up of a steel wire is wounded on a drum to raise the cage and a balance weight. This balance weight or counterweight magnitude is greater than that of empty cage, but less than the loaded cage. For each quadrant of operation, direction of rotation, w, load torque, TL, and motor torque Tm are shown in figure. Consider that the load torque is constant and independent of motor speed. The four operating modes of a hoist are described below. Loaded cage moving up This is the first quadrant operation of the hoist in which the loaded cage is moving upwards. Due to the upward movement, the direction of rotation of motor, w will be in anticlockwise direction, i.e., positive speed. Here the load torque acts in opposite direction to the direction of motor rotation. Therefore, to raise the hoist to upwards, the motor torque, Tm must act in the same direction of motor speed, w. So both motor speed and motor torque will be positive. To make these as positive, the power taken from the supply should be positive. This is called forward motoring. four quadrant operations of a hoist Empty cage moving up This is the quadrant-2 operation of the hoist in which unloaded cage is moving upwards. As said above, the counterweight is heavier than the unloaded cage and hence hoist can move upwards at a dangerous speed. To prevent this, motor must produce a torque in the opposite direction of motor speed, w in order to produce brake to the motor. Therefore, the motor torque, Tm will be negative and motor speed, w will be positive. Since the speed of the hoist is positive, it receives the power from the supply and hence the power is positive. This quadrant operation is called forward braking. Empty cage moving down This is the quadrant-3 operation where empty cage is hoisting down as shown in figure. The downward journey of empty cage is prevented by the torque exerted by the counterweight. So the direction of motor torque, Tm should be in the same direction of motor rotation w. Due to the downward movement of the cage, the direction of rotation is reversed, i.e., w is negative and hence Tm is also negative. Since the machine acting as motor in reverse direction, it receives the power from the supply and hence power is positive. This quadrant operation is called reverse motoring. Loaded cage moving down In this quadrant, loaded cage is moving downwards. Since the loaded cage is moving downward (of which weight is more than counterweight), the motion takes place without use of any motor. But there will be a chance to go downward at a dangerous speed because of loaded cage. To limit the speed of the cage within a safe range, the electrical machine must act as a brake. In this the direction of the motor, w is negative and hence the motor torque Tm is positive to decrease the speed of the motor. Thus the power is negative that means the electrical machine delivering power to the supply. This phenomenon is called as regenerative action. This quadrant operation is called reverse braking. It is to be noted that the electrical machine acts as a motor in 1st and 2nd quadrants and acts as a generator in 3rd and 4th quadrants. But the motor should be separately excited DC motor or three-phase AC induction motor to operate in these four different modes. Four Quadrant Operation of a DC Motor In a separately excited DC motor, the steady state speed is controlled at any desired speed by applying the appropriate magnitude of voltage, also in either direction simply by giving appropriate polarity of the voltage. The torque of the motor is directly proportional to the armature current, which in turn depends on the difference between the applied voltage V and back emf, E, i.e., I = (V – E) / R Therefore, it is possible to develop positive or negative torque by controlling voltage, which is less than or more than the back emf. Hence the separately excited DC motor inherently exhibit four quadrant operation. The below figure shows four quadrant operation of a separately excited DC motor in which a dot symbol on one of motor terminals indicates the sign of the torque. The machine produces a positive torque, if current flows into the dot. Similarly the torque is negative, if current flows out of the dot. Also, the relative magnitudes of voltage and back emf are shown in figure. These four quadrants are explained below. four quadrant operations of a DC motor Forward Motoring In this mode of operation, the applied voltage is positive and greater than the back emf of the motor and therefore a positive current flow into the motor. Since both current and voltage are positive, the power becomes positive. And also the speed and torque are also positive in this quadrant. Therefore the motor rotates in forward direction. first quadrant operationForward Braking In this mode of operation, the motor runs in forward direction and the induced emf continues to be positive. But the supplied voltage is suddenly reduced to a value which is less than the back emf. Hence the current (there by torque) will reverse direction. This negative torque reverses the direction of energy flow. second quadrant operation Since the load torque and motor torque are in opposite direction, the combined effect will cause to reduce the speed of the motor and hence back emf (motor emf is directly proportional to the speed) falls again below the applied voltage value. Hence, both current and voltage become positive and the motor settle down to first quadrant again. The process by which the mechanical energy of the motor is returned to the supply is called as regenerative braking. This quadrant operation is the example of regenerative braking. Reverse Motoring This is the third quadrant operation of the motor in which both motor voltage and current are negative. Thus the power is positive, i.e., the power is supplied from source to load. Due to the reverse polarity of the supply, the motor starts rotating in a counterclockwise direction (or reverse to normal operation). third quadrant operation The operation of this quadrant is similar to the first quadrant, but only difference is the direction of rotation. The magnitude of voltage to the motor decides the appropriate speed in reverse direction. Reverse Regenerative Braking This is the quadrant-4 mode of operation in which motor voltage is still negative and its armature current is positive. This mode of operation is similar to the second quadrant operation and once again the regeneration occurs whenever the back emf is more than the negative supply voltage. Hence the torque will be positive which opposes the load torque, thus the speed of the motor will be reduced during reverse operation of the motor. fourth quadrant operation‘ This mode of operation is mostly used for plugging in order to stop the motor rapidly. During plugging, the armature terminals are suddenly reversed, which causes the back emf to force an armature current to flow in reverse direction. Now the effective voltage across the motor becomes 2V (as V+ Eb). A braking resistor in series with the motor has to be connected to limit this current. Braking by plugging gives greater torque and more rapid stop, but the current drawn from the supply and energy stored in mechanical parts must be dissipated in resistance.