The board is randomly filled with positive and negative pieces, and a single white square. Player 1 moves the square horizontally, and player 2 moves the square vertically. (In the 3d board variation, the direction of movement cycles through the X, Y, and Z directions). Each turn, each player moves the square to a cell with circles in it. Green circles represent positive scores, and red circles negative; gray circles are 0 points. A large circle is 5 points and a small circle is 1 point; for example a cell with 1 large and 3 small green circles would be +8 points. The circles are removed and replaced with a gray square, and the moving player scores that number of points. The game is over when a player cannot move (because all the cells in the square's row or column have been used), and the player with the highest score wins.


Player 1 could score 8 points by moving to the highlighted cell, but that would allow player 2 to score 15 points by moving down. A better play is the 7 point cell.