The object of the game is to move your six playing pieces from one side of the board to the opposite side. The game is played by either two or four players. The catch is that the pieces all look identical; they are identified by a colored ring on their underside only. On your turn, you move a piece forward, sideways or diagonally, possibly jumping over a single piece (a series of jumps is possible if the right gaps are present, as in Checkers). When a piece reaches the far side, it is turned over to reveal its true owner. If yours, it stays there; if not, it reverts to its indistinguishable side and its true owner must move it on his next turn. During play, you can also challenge the ownership of a piece being moved. The incorrect player forfeits his turn. The german Schmidt Spiele edition was published as a game of the Schmidt Spiele-Bar series in book case format.