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How do you recognize cheaters?

I have been playing for about half a year and I was wondering, how do you recognize cheaters?
The more this is public knowledge, the harder it will be to catch cheaters, so it's best kept under wraps :)
Play and have fun. The rate of cheaters playing is low here and Lichess has a good system for catching those that do.
You can recognize cheaters if they let their time run out. Another cheating strategy, that no one should use, is receiving aid from a chess engine. Whoever does this is a horrible chess player, and it kills the fun from playing chess. So there you go!
Experience is like a 6th sense.

Rating stats exist on the chances of winning a chess player.

Humans don't play like engines. An engine needs to do something for an advantage.

The medium high and low peaks performances of all players should be able to tattletale what a common chess player can and cannot do on their own.
There's no easy to way to tell if someone is cheating (certainly not based on a single game).
Most of the "heuristics" you find online don't really work. For example, some people suggest that if your opponent got a 0/0/0 game (0 mistakes, 0 blunders, 0 inaccuracies) and a has a low centipawn-loss, it indicates that opponent was likely using an engine.
But this is simply not true, i have a few 0/0/0 games myself and they were possible because my opponent played quite poorly making finding the strongest replies easy for me.
So just to say, that one metric or even a set of metrics may not be enough to prove someone is a cheater.
The algorithms lichess uses are very likely based on statistical learning and as such work on a relatively large set of data and more than a bunch of metrics.
Dont worry, 99% cheaters will be caught within a few days!
This is not chess.com, this is lichess! :D

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