During online play, you can switch chess boards. Press Select, go to "Preferences", select "Board", then scroll to find twelve additional chess boards. After you have selected your board preference, you can only save the data when you back out to the main menu (offline).
You can bypass the ten minute game limit in all tournaments by outputting the PlayStation 2 video signal into a VCR and recording the game. Pause the game and rewind the tape to the last move. This gives you a chance to study the board for as long as desired instead of being forced to move quickly because of a declining clock.