I got an odd glitch a couple times: the blue moves, then before I can do anything they move AGAIN and I'm out. It happened on the very first puzzle, dunno if that can help... I'm unable to reproduce this odd behaviour in a consistent manner so I can't tell what's actually going on (even tried keeping my hands up to avoid accidentally hitting a key ^^;!).
This game a lovely old-times feel. Now if only I didn't suck at chess the way I do...
Edit: the glitch occurred in the fourth puzzle only