Well, I think he wants a fight and is trying to goad you. I
don't think he's nuts but he wants a battle - probably wants to
win. Sometimes I play along with people like that. I give them a
decent battle and then I start predicting their moves, which
they hate and then at the very end, I give them the trophy and
say, "You win with a superior logical argument", because the
game *I'm* playing isn't to win an argument; it's entertainment
and the potential to acquire new knowledge and I continue as
long as I find it entertaining and I'm learning something..