717000717000717000717000 111000111000111000111000 717000717000717000717000 000717000717000717000717 000111000111000111000111 000717000717000717000717 777000777000777000777000 777000777000777000777000 777000777000777000777000 000777000777000777000777 000777000777000777000777 000777000777000777000777 777000777000777000777000 777000777000777000777000 777000777000777000777000 000777000777000777000777 000777000777000777000777 000777000777000777000777 747000747000747000747000 444000444000444000444000 747000747000747000747000 000747000747000747000747 000444000444000444000444 000747000747000747000747 Checkers ... however, the 3x3 squares don't line up well with the 2x2 sensors. Chess MAY also be possible if you can design 3x3 pieces