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Irwin – the protector of Lichess from all chess players villainous

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Re: Irwin – the protector of Lichess from all chess players villainous

#21
post #14

I’ve seen a video of Magnus Carlsen playing on Lichess before. Does Irwin ever accidentally flag him or people like him? Do these sorts of folks have to be verified in some fashion?

What it looks like to cheat is more than just playing relatively accurate moves. Average move time, centipawn loss over multiple games, blunder/mistake frequency across multiple games, strengh of moves while in time trouble, etc. Cheaters tend to stand out when you look at a short history of games.

Re: Irwin – the protector of Lichess from all chess players villainous

#23
post #4

This is really cool. Rampant cheating is the reason I completely abandoned playing chess, so nice to see something happening.

How do you cheat at chess? Serious question… there are fixed rules that govern the game, certainly a piece of software or in the human case 3rd party observer should be able to enforce them? In other words, given a list of moves, you can write a program that returns `valid` if the set of moves is allowed or `invalid` if it is not, no?

Simple. You use an engine to decide what moves you make instead of your own knowledge and skill. It's depressingly common.

Re: Irwin – the protector of Lichess from all chess players villainous

#24
I love chess. At my absolute best, I had a over-the-board USCF rating of 2156. I never made it to master no matter how hard I tried. So, ticked off, I gave up serious play. Years go by and while I'm no where near as good these days, I started enjoying playing again. And, then I start running into people online who were clearly using engines instead of their own skills and wits. Now, I only pay with friends and over-the-board. If this can help wipe out the cheats, I may finally go back to playing online again.

Re: Irwin – the protector of Lichess from all chess players villainous

#25
post #14

I’ve seen a video of Magnus Carlsen playing on Lichess before. Does Irwin ever accidentally flag him or people like him? Do these sorts of folks have to be verified in some fashion?

What it looks like to cheat is more than just playing relatively accurate moves. Average move time, centipawn loss over multiple games, blunder/mistake frequency across multiple games, strengh of moves while in time trouble, etc. Cheaters tend to stand out when you look at a short history of games.

No post body was provided.

Re: Irwin – the protector of Lichess from all chess players villainous

#26

Earlier quoted context omitted.

What it looks like to cheat is more than just playing relatively accurate moves. Average move time, centipawn loss over multiple games, blunder/mistake frequency across multiple games, strengh of moves while in time trouble, etc. Cheaters tend to stand out when you look at a short history of games.

Quoted post unavailable.

Are you trolling? No it isn't?

If nothing else, the time issue is a huge one. Cheaters have very consistent seconds-per-move while actual masters make obvious moves instantly and pause on tougher moves.

Re: Irwin – the protector of Lichess from all chess players villainous

#27

Earlier quoted context omitted.

What it looks like to cheat is more than just playing relatively accurate moves. Average move time, centipawn loss over multiple games, blunder/mistake frequency across multiple games, strengh of moves while in time trouble, etc. Cheaters tend to stand out when you look at a short history of games.

Quoted post unavailable.

I thought it was a reasonably good answer considering that the question doesn't explicitly spell out why it might flag someone like Magnus Carlsen (who I learned is a grandmaster and World Chess Champion). To rephrase it, Irwin doesn't flag people for playing well — it alerts moderators when it finds suspicious signals across several dimensions.

Re: Irwin – the protector of Lichess from all chess players villainous

#28
post #14

I’ve seen a video of Magnus Carlsen playing on Lichess before. Does Irwin ever accidentally flag him or people like him? Do these sorts of folks have to be verified in some fashion?

High level humans and chess engines play differently. You can see commentary on chess YouTube videos when they run across cheaters.

Also the chess engines people use are accessible, you can compare what a suspected cheater does with what the cheater does and if they’re exactly the same consistently, you have a pretty strong signal.

One of the bigger tells are strange moves that set up a many move series resulting in a victory, things that humans just can’t find quickly.

Re: Irwin – the protector of Lichess from all chess players villainous

#29

Earlier quoted context omitted.

What it looks like to cheat is more than just playing relatively accurate moves. Average move time, centipawn loss over multiple games, blunder/mistake frequency across multiple games, strengh of moves while in time trouble, etc. Cheaters tend to stand out when you look at a short history of games.

Quoted post unavailable.

It is a comprehensive answer.

Top human players tend to not make the moves engines make. They also stay relatively strong when under time pressure, where lots of humans reentering moves from a computer fail.

Playing someone taking 10 seconds for each move— whether there is only one valid move to capture back or the situation is complicated— you get suspicious. And then when they forget how to play when they have 3 seconds per move stands out.

Re: Irwin – the protector of Lichess from all chess players villainous

#30

Earlier quoted context omitted.

Quoted post unavailable.

Are you trolling? No it isn't? If nothing else, the time issue is a huge one. Cheaters have very consistent seconds-per-move while actual masters make obvious moves instantly and pause on tougher moves.

I suppose that only completely newbie cheaters would think of taking the same amount of time to make each move. It’s like the first rule of pretending to be a human: add a random delay to all of your actions.
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