How did he learn to play chess?
Somehow in all the many times that I've watched this movie I never caught the fact, until last night, that it's never explained how he learned to play chess. He just . . . knows how. The mom even makes a comment about how she doesn't know how he knows but he does.
Perhaps he picked the basics of the game up at school, but to play at the level that he does even in the earlier parts of the movie would've required real study.
Anyone have an idea on where he learned to play and how he's as good as he is even before he starts getting real training?