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 "come to the conclusion that snooker is in need of a huge transformation". Gunner stated "It had struck me for some time that the game of snooker needed a new and exciting transfusion", and that he took his inspiration from "seeing how Twenty20 cricket had revitalised cricket". Power Snooker officially launched on 22 July 2010 with former World Champion Ronnie O'Sullivan as the main snooker player endorsement . O'Sullivan said of the new format that "crowd will love it and the public will enjoy it." and that this was "the future of snooker". Power Snooker is independent of the World