Hey all, My dad's after a decent chess game for his DS. We play 42 all time classics but he wants something a little more challenging / suited to just chess. I thought it'd be easy enough to find out, but my lord. How many games are really necessary? I gave up after seeing titles along the lines of "Petz: My Fav Chess Piece", "Bratz: 2day we play sum chezz" and "150% Chess 4". What's your recommendations? Cheers crew!