I got myself a Nintendo DS Lite and a chessmaster program to go along with it. It is a nice piece of chess software, as far as chess program goes. The playing style is natural, unlike the PC version. However, Ubisoft does have bugs in their program. Idea-wise, they're great. Implementation is lacking.In this case, there seems to be an error in their en passant move. It's okay if you preview the game move by move. But hitting rewind/start button will reveal the bug.And for some reason, they have multiplayer chess variant, but not game analysis. I'll have to keep looking. I wonder if Fritz or Hiarcs has a DS version?