Abstract: Game apparatus including a board and playing cards in which the board forms a grid of squares with the four sides of each square being identified by a different color and with the colors so arranged that the same color is not employed to identify contiguous sides of a square. Side marker elements are used to establish and define the sides of squares, as determined by the play of cards having corresponding colors. The establishment of the last or fourth side of any square establishes a score for the player making the play.