JUDGMENT

But if you had entered Shodov in a different tournament, all his opponents would have been wary of him, and it's unlikely that, given those circumstances, this player would risk cheating again.

How can you be on guard if he cheats skillfully and doesn't repeat the same mistake that can be immediately identified by looking at his guild? Lose until 2-3 a.m. (sometimes even 5-8 hours), and then check all the save files, or reload after every turn?