The object of the game is to be the first player to pose the fourth different shape of a row, column or square area. The players take turns putting one of their pieces on the board. It is forbidden to place a shape in a row, a column or an area on which the same shape has already been placed by the opponent. You can only double a shape if you have played the previous one yourself. The first player to place the fourth different shape in a row, column or area immediately wins the game.