It means that he bows to your great wisdom and skill and wishes that he could be more like you in every way.
meaning of "fy" after beating American

He probably mistyped "ty", which would mean "thank you".
Well that's better than my initial impression.
He probably mistyped "ty", which would mean "thank you".
Well that's better than my initial impression.
Yes, an extremely charitable explanation

no its probably correct actually, else he would have typed the more traditional 'fu'
Maybe he mistyped fu.
Sadly, both possibilities are in common chess usage online.

The "gg" meme is beyond my understanding. Perhaps I should take a break from chess and get a life.
...I haven't figured out what a "life" is yet. Maybe its a variation of the Caro-Kann?

Perhaps he thought you were being sarcastic and therefore bragging, so he responded irritably with $%#@.

Maybe he was typing "fyi, I don't think I played all that well but I appreciate your kind comments if you really do think I played well, or I do appreciate it if you are trying to cheer me up after losing that game. But I wish you all the best, and hope you have many, many more enjoyable games to come, and I bow to your superior ability." but he lost his internet connection after the first two letters.

Maybe he was typing "fyi, I don't think I played all that well but I appreciate your kind comments if you really do think I played well, or I do appreciate it if you are trying to cheer me up after losing that game. But I wish you all the best, and hope you have many, many more enjoyable games to come, and I bow to your superior ability." but he lost his internet connection after the first two letters.
...a possibility.

The OP is right that "fy" looks sloppy and hardly adequate, and "fu" wouldn't be much better either. That is because there is a site glitch at the moment that prevents us from typing some expressions correctly. Hopefully this issue will be resolved soon.

Have no foggest idea. Decided to google "fy", to help fellow member in solving mistery. It appers to be highly sophisticated techincal terminology.

Maybe fy is ambiguous, maybe it was a slip of the key. In my experience with live chess some players say impolite things clearly and with the clear intent to insult. After a few experiences with insulting comments I think the best thing to do is just block the player and move on to the next game. preferably with an ice cold beer in one hand and a curvy broad in the other :)
Hello, I am new at this. I just beat [username removed], an American slow player, and after I checkmated him, I courteously said "Well played", his answer bein "fy". Is this common chess usage?