People say he's a great chess player. As true as that might be, i think i can school him at chess.
People say he's a great chess player. As true as that might be, i think i can school him in chess.
People say he's a great chess player. As true as that might be, i think i can school him in a game of chess.
What preposition is the most appropriate to use there? I looked up the idiom "school somebody", and in the examples the site had, they'd used in.