Duplex Billiard-4: The difference of this version: there are two kinds of balls on the table - pink balls are yours, yellow balls are opponent's. You must put your pink balls to pockets, while your opponent must put only yellow balls to pockets. "Your" pink balls increase your score; yellow balls increase opponent's score. You play simultaneously with your opponent. Make your shot as your red cue ball has stopped. Your opponent also dont wait, he make his shot, as his orange cue ball has stopped. The player, who have scored more his balls, wins the set.