I bought a Nokia phone a few months back and got into downloading games for it only recently. I hit upon an absolutely fantastic Chess game for Symbian phones. It's called ChessGenius and I've spent sleepless nights playing against it on my mobile. I've won only 2, keeping the competition (read 'opponent') at the simplest level. There's no guessing what'll happen if ChessGenius plays in a stronger mode! After all, I'm as good at it as a Sumo wrestler may be at figure-skating!
It's a dream game for me and I'm thoroughly enjoying playing against my newfound opponent.