TheCheese33: Personally, I can't see why you would want one than more chess game. Battle Chess is fun, and I've heard good things about the Chessmaster franchise, but one is enough for a lifetime, unless they create some crazy 3D version that goes over-the-top, with explosions, decapitations, and general craziness.
Not exactly. The Chess AI varies wildly from game to game. In the Battle Chess series it is very poor even on the hardest difficulty settings. So if you've got Battle / Combat Chess and are looking for a challenge - you'll have to get a chess game with a proper chess engine.