Rating Manipulation

Yesterday, my opponent purposefully lost several dozen rated games against me. Today, I received a message from Lichess saying, "In your game history, you have several games where the opponent clearly has intentionally lost against you. Attempts to artificially manipulate your own or someone else's rating are unacceptable. If this behavior continues to happen, your account will be terminated."

If my opponent purposefully loses against me, how is that my fault? Is there some rule against this?

is that à joke???

Unless you somehow got paired dozens of times against him in a tournament, it was your choice to play him. You could have reported him and moved on.

If this is true, you are just wasting your time and fooling yourself playing against him, in chess you must have to think a little bit to win, this is fun.

@RapidVariants

So Lichess's rules compel me to stop playing an opponent who is losing on purpose?

@Clean-Way14

I've found that I gain rating much quicker against opponents who lose on purpose than opponents who do not.

Lichess's Terms of Service: "what you shouldn't do. (...) Artificially inflating or deflating your rating. This is where a User purposefully loses, or has arranged with an opponent to win". Indeed, you are compelled to stop playing when your opponent loses on purpose, otherwise you make a quiet arrangement. I actually read Terms of Service before opening my account, but maybe it is just one of these mine strange habits...

Yes, if the games are rated. Losing on purpose is sandbagging. Repeatedly playing against someone who loses on purpose is boosting. Continuing to do it after being warned will get you permanently banned for rating manipulation.

@yabbadabbadooooo Right, it is a false rating anyway, but if it fill your needs go for it.

@Otienimous

I do think it is just a strange habit of yours. I'm quite sure nobody actually reads the Terms of Service.