I expect chess rating among LWers to be determined far more by how much time one's put into getting better at chess than by IQ, for the usual reason.

Back when I was in secondary school I played a moderate amount of chess and was maybe somewhere around 1750 (i.e., better than almost anyone who has never taken the game at all seriously, and worse than almost anyone who's actually any good). I play only rarely and casually now; perhaps 1600ish?