Yu is an abstract strategy game. Players place their stones on the playing field, trying to occupy four adjacent spaces in a diamond shape. The first player who manages that is the winner. Each player has 12 stones of his colour. On your turn you can either place up to 5 of your stones on an empty space or on a space with fewer opposing stones, or move any number of your stones from one space to an adjacent space that is either empty or contains fewer opposing stones.