Duplex Billiard 1x1: There are only 2 balls on a billiard table. The red ball - is your cue ball. The Opponent plays with yellow cue ball. Each player may make his shot just when his cue ball has stopped. So, both players may play simultaneously. The idea is to score more opponent's balls. The player, who has scored more opponent's balls during the 2 minutes set, wins the set.