Blackball (pool) number "8" (a holdover from kelly pool), though numberless variants are not unknown. British pool tables come in 6 × 3 foot (1.8 × 0.9 m) or 7 × 3.5 ft (2.12 × 1.06 m) varieties, with 7 feet being the regulation size for league play. The table has pockets just larger than the balls and rounded, as in the game of snooker, whereas the international-style (or "American-style") table has pockets significantly wider, with pointed . Tournament rules may require the presence of more than one type of (mechanical bridge), as in snooker. There are two competing standards bodies that
Power Snooker 30 minute game play period, with the balls being continually re-racked. The winner is the player who has scored more cumulative points by the end of the fixed game play period, with ties settled with a single . The 30 minute game clock is halted between frames. Also unlike traditional Snooker, which uses 15 racked in a triangle shape, Power Snooker matches use just nine red balls in a diamond shape. Basic play in Power Snooker is scored in the same way as traditional snooker. On the shot however, the starting player keeps his turn at the table as long