The following are known GameShark Codes for Chessmaster II on Sony Playstation (PS1).
These codes were also known as Action Replay Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

• Time Always 00:00:00 for White
  8009B1F0 0000
• Time Always 00:00:00 for Black
  8009B1F4 0000
• Always White’s Turn
  8009B19C 0010
• Always Black’s Turn
  8009B19C 0020