Pool, also more formally known as pocket billiards (mostly in North America) or pool billiards[1] (mostly in Europe and Australia), is the family of cue sports and games played on a pool table having six receptacles called pockets along the <dfn style="border-bottom:1px dotted #0645AD; font-style:inherit;">rails</dfn>, into which balls are deposited as the main goal of play. Popular versions include eight-ball and nine-ball. An obsolete term for pool is six-pocket.[2]
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The Oxford English dictionary states that pool is generally "any of various types of billiards for two or more players" but goes on to note that the first specific meaning of "a game in which each player uses a cue ball of a distinctive colour to pocket the balls of the other player(s) in a certain order, the winner taking all the stakes submitted at the start of the contest" is now obsolete and its other specific definitions are all for games that originate in the United States of America.[3]
Outside the cue sports industry which has long favored the more formal term, pocket billiards is (in English) more commonly referred to as pool, due to perhaps an association with the poolrooms where gamblers pooled their money to bet off-track on horse races. Because these venues often provided billiard tables, the term pool eventually became synonymous with billiards.
In the United States, though the original "pool" game was played on a pocketless carom billiards table, the term later stuck to pocket billiards as it gained in popularity. As the traditional view of billiards as a refined and noble pastime did not blend well with the low-class connotations of gambling, the billiards industry began to distance itself from the term pool beginning in the late 19th century.
There are hundreds of pool games. Some of the more well known include eight-ball, nine-ball, ten-ball, straight pool, and one-pocket.
There are also hybrid games combining aspects of both pool and carom billiards, such as American four-ball billiards, cowboy pool and bottle pool.
Pool uses different equipment from carom billiards. Other than the table having pockets, the billiard balls for pool are generally smaller and range from 2.25 inches (57.15 mm) in diameter to 2.375 inches (60.33 mm) in diameter; by comparison, carom billiard balls are 61–61.5 mm [between approximately 2 3⁄8 and 2 7⁄16 in].[4] Under the WPA/BCA (see below) equipment specifications, the weight may be from 5.5 to 6 oz. (156–170 g) with a diameter of 2.25 in. (57.15 mm), plus or minus 0.005 in. (0.127 mm).[5][6] Modern coin-operated pool tables generally use one of three methods to distinguish and return the cue ball to the front of the table while the numbered balls return to an inaccessible receptacle until paid for again: the cue ball is larger and heavier than the other balls, or denser and heavier, or has a magnetic core. Modern pool tables generally range in size from 3.5 feet (1.07 m) by 7 feet (2.13 m), to 4.5 feet (1.37 m) by 9 feet (2.74 m). Modern cues are generally 58.5 inches (148.6 cm) long for pool while cues prior to 1980 were designed for straight pool and had an average length of 57.5 inches (146.1 cm). Carom billiards cues are generally shorter with larger tips, and snooker cues longer with smaller tips.
As a competitive sport, pool is governed internationally by the World Pool-Billiard Association (WPA), which has multi-national, regional affiliates comprising the All Africa Pool Association (AAPA), Asian Pocket Billiard Union (APBU, including the Middle East), Billiard Congress of America (BCA, Canada and the US), Confederation Panamerica of Billiards (CPB, Latin America and Caribbean), European Pocket Billiard Federation (EPBF, including Russia and the Near East), and Oceania Pocket Billiard Association (OPBA, Australia, New Zealand, Pacific islands) The WPA represents pool in the World Confederation of Billiard Sports, which in turn represents all forms of cue sports in the International Olympic Committee.
Some of the other cue sports that come under the auspices of the World Confederation of Billiard Sports are The Union Mondiale de Billard (French for World Union of Billiards) is the world governing body for carom a pocket less form of billiards, and the World Professional Billiards and Snooker Association (professional) and International Billiards and Snooker Federation (amateur) the world governing bodies for snooker and billiards (English) other cue sports played on a table with pockets.
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