Regarding Chess: Have you noticed that (+) Size forces an AI move?
Sudoku: Sorry I have still no touch-device (PRS-650S is back-orderd) to test. It's operational in the Sim-Enviro. And I remember that an earlier version was reported working
here with the PRS-600 except Quit-Game?
@Ben: may you have a look on Sudoku at your PRS-600 please?
No reports yet for: Fiveballs and Freecell