Rules are quite simple. You have a desk in the shape of cross. Each wing of the cross is made from square with three lines of pawns and there is a hole in the middle of the cross. For a better image just look at the picture. If you jump with a pawn over another pawn, the cross-jumped pawn will disappear. You can jump only horizontally and vertically, not diagonally. Your task is to remove all pawns and to end with the last pawn in the middle of the cross.