where can I set, that I don't want to play against one player

[yrrepnadohr]

Where can I set, that I don't want to play against one special player?
Is there a possibillity to set a player on a (so called) "no play gainst" - List ?

Don't have a special player in mind yet, just a question because I am curious for a possibillity of this

Sorry for my bad English writing

[SwHawk]

Just give them a red thumb, that's what they are for

[sesc]

Yes, red thumb them. Personal red thumb is enough.

But for tournament games this will be ignored, so if you join a tournament, you may still be paired against that player.
For Arena games I am not sure. I think I remember to have read somewhere, red thumb is also ignored there, but maybe it was only a discussion about that?

[Meeplelowda]

Where can I set, that I don't want to play against one special player?
Is there a possibillity to set a player on a (so called) "no play gainst" - List ?

Don't have a special player in mind yet, just a question because I am curious for a possibillity of this

Sorry for my bad English writing

As the others have said, you can avoid a player by giving them a red thumb (except in a tournament). But they have assumed you know what a red thumb is.

In case you don't, you can give a red thumb in at least two ways:
1) Go to their profile page (by clicking on their username or searching for their username in the site search bar in the upper left) and under the "Reputation" heading there is a green and red thumb. Click the red thumb and follow the instructions. Click the option that says "This is my personal opinion" unless you have a specific complaint against this player.
2) After a game ends there are green and red thumbs in the game score summary area. Click on the red thumb and follow the instructions.

[cigma]

And please notice: to avoid misuse, for any red thumb you give, you need to give 5 green thumbs to other players beforehand. So be prepared by giving green thumbs to players you liked to play with!

[Meeplelowda]

And please notice: to avoid misuse, for any red thumb you give, you need to give 5 green thumbs to other players beforehand. So be prepared by giving green thumbs to players you liked to play with!

Doesn't this only apply to public red thumbs?

[cigma]

And please notice: to avoid misuse, for any red thumb you give, you need to give 5 green thumbs to other players beforehand. So be prepared by giving green thumbs to players you liked to play with!

Doesn't this only apply to public red thumbs?

Yes, that's right. Thanks for your clarification

[yrrepnadohr]

thanks to the infos with the red thumb
And thanks to Meeplelowda how to do this red thumb thingy
Was new to me