Parity

This game is played with thirty cards from a standard deck of cards. Both player is dealt 15 cards, hence they exactly know the cards in the hand of the other player, this is the novelty in this otherwise simple trick-taking game. Then the dealer determines the target parity, tricks are played, and bonus points are awarded for winning the required parity of things. A three-player variant also exists, but it lacks the element of perfect information.