Similar to Tic-Tac-Toe. The players choose their symbol: cross or circle. In turn, each player take a blank cube, or one with his/her symbol on it from the board. Then replaces it with his/her symbol on the top face, pushing one of the ends of the incomplete rows. The winner is the first player to make a horizontal, vertical or diagonal line with 5 cubes bearing his/her symbol.1995 Mensa Select - BoardGameGeek