Finally, a game for the weekend mentalist. Mastermind without the logic. An iterative, multilayered rock-paper-scissors. A minimalist card game for two players.
In a series of rapid four-card rounds, one player decides secretly to collect either reds or blacks. It is the other player's job to determine which color his opponent is aiming for based on his play. To win is to recognize a pattern in the chooser's bluffs. Play this game a few times with a friend or enemy, and see if you don't understand each other a little better afterwards.