All of the boards provide a solitaire puzzle which may be solved. In all the boards except the basic 8x8, the pieces fit snugly.
Select the appropriate board, and PUZZLE in the OPTIONS menu.
You can place pieces on the board, move them from spot to spot on the board, or drag them off the board. If you try to move the piece to somewhere it can't fit, the piece will return to its original off-board position. Pieces cannot be placed on the black squares.
The object is simply to place all the pieces on the board.