[computerdork]

Am not a statistician, but at least in an online analysis I saw, seems like correlation can effectively identify players who are playing too much like a computer. Because they don't just run correlations on Niemann, but on all the top players, and do comparisons (and for certain long stretches of tournaments, Niemann's is playing way, way above how anyone else has ever played).

This is video explains it pretty well, and seems like a very compelling argument (at least to me): https://www.youtube.com/watch?v=qjtbXxA8Fcc - and just know that the woman talking is a bit hard to understand because of her accent.

... oh, and to address your point about 100's of engines, my first thought was that are only a handful that everyone uses (Stockfish?) (and also, just guessing, but I get the impression that most top engines recommend similar moves, but again, just a guess!).

[matttb]

They are referring to this: https://www.reddit.com/r/chess/comments/xqvhgh/chessbases_en...

[computerdork]

Ah, have to admit, this is a very good counter argument, calling chessbase's methods in to question. And it's surprising that chessbase does not always do the same analysis for each game, that its nodes aren't setup with the same set of chess engines (although, again, maybe most top chess engines suggest similar moves??). Hmm...

... also, not sure I agree with his opinion that for each move that is analyzed, LetsCheck will return 100% if any engine returns 100% (and there could be multiple computers that were used, each with different engines). The point of the analysis is to determine if a player is playing like a computer, and the user may himself have multiple chess engines open in order to confuse the cheat detection. But again, am not an expert at chess engines or statistics, so am not sure what effects checking multiple engines has...

... also, he says that "Ken Regan's scientifically valid method has exonerated Hans by saying his results do not show any statistically valid evidence of cheating." This is very confusing, because Chess.com post has basically said the opposite (maybe Ken Regan's analysis is referring to a different subset of games?). Guess nothing is definitive. But at this point, I still lean towards Hans cheating (on top of this analysis, there is also a lot of circumstantial things he did that to me indicate he might have cheated, which is too long a topic to go into).