I think this is being approached incorrectly. The thing that stands out to me is that people find his analysis of games to be poor. If he can't explain his reas

I think this is being approached incorrectly. The thing that stands out to me is that people find his analysis of games to be poor. If he can't explain his reasoning, it suggests he may not have reasoned it. This is interesting as there's two sides to this problem. One is that he is good at chess and could be cheating. The other is that he is actually not great at chess and could be cheating. If people think his analysis skills are weak, then it suggests the latter case, which seems easier to test.