Tournaments At GrandBilliard, you'll find tournaments happening every day! Download our software now to check out our fantastic variety 8ball, 9ball and snooker tournaments: SIT & GO In a Sit & Go pool tournament the number of players who can register to play the games is predefined. The pool tournament begins when certain numbers of players have registered. EVENT An Event tournament is a tournament in which the number of players, the time, and the date are predefined.