there are actually several chess for GP32 around:
- GPChess v0.99 from rcx21000 (ADIC 2003 version, haven't tried it yet but will soon as earlier versions looked really good)
- Battlechess for NES (the 2D option is normal chess play)
- Chessmaster for SNES
- Game partner 32 (although I think that the AI is from an earlier version of GPChess)
That's for the ones I know B)