The game was:
Mr. Internet wrote:
Strategic Simulations, Inc.
An abstract chess-like game which involved building fortresses in order to block out one's opponent. Mentally challenging, albeit not overly stimulating.
I may have it in a bundle of atari 800 roms I have. I will check tonight when I am home.
Depending on its complexity, it may easily be emulated with a normal chessbaord (8x8) and a couple generic game pieces, maybe Icehouse pieces.