How Do Lichess Detect Cheater?

@Deadban said in #15:

How do you think the "cheat detected" works?

Lichess uses two different software agents to detect computer assistance:

Irwin looks for play characteristic of chess engines: https://github.com/clarkerubber/irwin

Kaladin looks for play uncharacteristic of the players: https://github.com/lichess-org/kaladin

That is quite interesting IMHO.

We all know Irwin but Kaladin might be extremely valuable, too.

In poker, giant as like Ps et winamaw use a scan on your computer (yes they are the allow for that), and you receive advertissement and later a ban if you use some sofwtare during your connexion.

That could be good about chess but globally there are more cheaters than we think. On MMO games, i prooved that 30% players use a cheating application (sample to 2 000 players) ; Only on the europe's serveur.
Chess amateur are same player, major want play, progress, get fun but a lot of want get that in cheat (for get success, recompense, classement or just cheat for the fun (it's in them natural to cheat), these players are like cancer).

Unfortunaly sanction about these cheater are only ban on the game, no tax, jail (yes a cheaters deserve jail, as from you impact the integrity physic or moral of a honnesty people). With sanction more heavy, we would meet less cheaters.

Simple answer: it doesn't. Just don't play 100% engine moves.

@Ecamvelo said in #23:

In poker, giant as like Ps et winamaw use a scan on your computer (yes they are the allow for that), and you receive advertissement and later a ban if you use some sofwtare during your connexion.

The software cannot trust the hardware or operating system it's running on. So there is simple workaround for this, just hook the functions the poker software uses to check for running processes and hide your process. Easy. In reality what they do is they just use statistical methods. Just like Lichess does. It's good enough to catch the dumb ones.

@Ecamvelo said in #23:

That could be good about chess but globally there are more cheaters than we think. On MMO games, i prooved that 30% players use a cheating application (sample to 2 000 players) ; Only on the europe's serveur.
Chess amateur are same player, major want play, progress, get fun but a lot of want get that in cheat (for get success, recompense, classement or just cheat for the fun (it's in them natural to cheat), these players are like cancer).

chess player population can not be compared to MMO player population, that is a logical fallacy.
under 1% of accounts are cheaters at lichess if i remember correctly.

if you cheat in a korea grind game, you do it to save time. if you cheat in chess, you do it to waste time. equalizing those cheater populations doesnt make sense and the numbers back this up.

Human cheat by "natural" (sorry for my english). On Lichess it's 1% because they catched only these 1%. Globally i am sure in chess there are (a lot of) less cheaters than mmo because it's a game where you need understand, learn, make a plan, otherwise told to be mature and have a thinking process, that mmo's player who cheat can't do.

In chess if you use a bot (1 step with bot and the next alone) it would be too much different, then we will see you cheat.

But i put cheaters in same category, in any game. The impact for "true" player is same, the bad reputation for the website it's same.

@Ecamvelo said in #23:

In poker, giant as like Ps et winamaw use a scan on your computer (yes they are the allow for that), and you receive advertissement and later a ban if you use some sofwtare during your connexion.

there's money involved with poker, sometimes 100s of 1000s, but even if it's $10, cheating in poker is more of a concern that cheating in chess. There are privacy concerns with scanning people's computers, so I doubt it's something lichess would do for ordinary games. I saw with some super GM online tournaments there were webcam requirements that needed to be met to play in the tournament.

I think with chess tournaments where prize money is involved the winners' games get a closer look than a normal game. just the with the audience, any surprising results get unofficially analysed by some curious public, and they can report the games if they think they are suspicious.

with poker, some people split the hdmi signal and run a copy of the signal to a separate computer which uses optical character recognition and poker solvers to tell them how to play in real time. like with some chess cheat detection, with enough samples it's possible to detect play that's too perfect or play that isn't human like.

I never played poker or looked into the scene, but for some reason I remembered being told that in poker websites you are allowed you use bots - and it's the opposing players responsibility to exploit the play algorithms in order to profit.

Lichess Has The Big Engines So If Lichess See's You Move At Least 10 moves of stockfish 13,14,15,16,17 and bigger engines.