Using a Go set, players take turns playing Go*Mofasta cards which allow them to place stones on the board. Although each player has a color-- one is black, the other is white-- the cards force them to place some of their opponent's stones along with their own. The winner is the first player to get 8 stones in a row. Cards and rules are available here: http://www.fecundity.com/pmagnus/gomofasta/