[Elhana]

On the other hand, if Niemann did exactly the same and researched less-known moves, he'd know how to play against them too. That won't actually prove he is cheating at that game. Just the fact that he analyzed them earlier. You'd need a significant number of such honeypot "incidents" to properly accuse someone of cheating.

[xlii]

That'd be an interesting exercise to figure out how big sample should be and how unlikely the moves would be. This is something for chess analysts I suppose.

I believe that there will never be decisive proof of Niemann cheating. But on the other hand chess is a game of strategy which seems to seep out of the playing board this time.