Question about ban

To attack the flank, but what has this party to do with it?

Your level of understanding of chess does not allow you to understand the idea, apparently, I'm sorry.

@AHappyBee that is not true. Dogmas do not exist in bullet. This is not really suspicious. Black was playing a5, a4 and he had 1800. Overall they had a match statistic of 19.5:10.5, not something like 30:0.

@AHappyBee dude you introduced the game to look for evidence about the ban. I tell you that it's most likely just a game between these two friends, I don't think there's anything suspicious about it.

@AHappyBee @xterm Their matches aren't the reason he got banned. False bans are unlikely, but if you really think it is a false ban contact Lichess through EMAIL. They will reevaluate your situation if it really is a false ban.

We have played for several years, there are many of our games in history. And now the friend is banned and therefore this topic arose. I hope one of the moderators will help me understand what happened to my friend's account. Please tell me what email i can use?

Tell them to use lichess.org/appeal. If it doesn't work there's nothing you or your friend can do. In any case always follow moderators' instructions.
Also avoid sharing the username of another player in a public forum.