Noob here: how did he cheat without getting caught? did he memorize chess engine responses? Or did he have a secret computer somewhere feeding him the moves?
Memorizing is not cheating. Many of the pros do that. He'd need to be receiving computer analysis during the game for it to be cheating.
I see. Yes the article which I read later, did mention players looking at gadgets in the toilet...among other techniques. I guess the future of chess championships would be interesting...