Few days ago I was watching a game review on lichess and found out one of the player's account was banned. Any idea why lichess does that?

  • Hi, and welcome to Chess SE! Could you please provide more information on the game and the players? A link to both the game and lichess' policy would be very useful in this context. Jan 29, 2019 at 17:55

2 Answers 2


First of all, lichess rarely bans players. What they usually do is flag their profile (usually for using chess computer assistance), remove their rating, and prevent them from p laying in tournaments and/or rating games. This is not a full ban.

To answer your question:

Lichess flags players for a variety of reasons, but (as mentioned above) they usually flag players for using chess computer assistance. They may also be flagged for sandbagging - artificially increasing or decreasing their rating.

If you want to know why are particular player was flagged, check their profile. There should be a large red banner informing you what has happened.

If you are wondering how the process of reporting/flagging players works, that would be a separate question.


The two main reasons:

  • Lichess detected that the player was very likely cheating.

  • The player used profanity or broke some rule of conduct.

  • Profanity is a fairly rare reason for banning.
    – Brandon_J
    Jan 29, 2019 at 22:35

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