I really like this chess game, except I haven't figured out how to get the computer to be white, but I did find out that if you clear both CPU White and CPU Black that you can play a two-player game. White always goes first.
Castling, en-passent and pawn promotion are all catered for, but the rule "Game is drawn if a position repeats three times" is not implemented. The CPU performs an alpha-beta search to a depth of two moves, but does not examine check at the deepest level.