how does chess.com detect cheaters?


If a player has a tendency to magically turn into Stockfish (because they're using Stockfish) when they're in a losing position, it's a dead giveaway. Basically, if your opponent takes 5 minutes to make a move from a clearly worse position and then becomes a 3000+ Elo god mode machine, you're playing a cheater. Rarely, a player who consistently plays extremely well (and then randomly sucks) may also get flagged.

https://www.chess.com/cheating
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