are there unknown talents in the world that we dont know can beat any super gm today even Magnus

Are there unknown talents in the world? Probably one born every day, just not developed yet.
There are famous and the not famous. So is there someone that is not famous that could beat anyone in chess? If they hide their talents, then it is possible. Some may not want the attention or the pressures of fame.

When chess players have aced the game, they are noble GM's of Chess.
Is there something beyond this noble prestige? Is it the title of World Champion? Or is there something else?

Example you take karate courses and finally get your black belt. What do you do with it?
So GM's get the title of GM and what do they do with it?

@Ihavenothing #20 Sorry, I don't know who are duong and degreave. But a long time ago, reading a chessbase article, I learn of some Japanese shogi player who in no time became an IM, I don't remember the name though.

I wish i had karate black belt. I would hang it in my tea room. God spending time on karate is so much more rewarding. I wish they hadn't destroyed me. I would train karate now.

yeah right

Chinese.

@Ihavenothing Ah, ok. Google "Shogi chessbase", you will see an article (maybe more than one) about shogi players turning temporarily into chess.

@d2d4again

The player you are thinking of is probably Yoshiharu Habu. He is a (arguably the) top-rated shogi player and is an FM in chess with an IM norm. This is definitely quite an achievement for an amateur player who picked up chess fairly late (started in his 20s, still took him 6 years to reach this level). He never really proceeded beyond this point, though I suspect that's probably more due to the fact that he invested his time in shogi rather than chess... being basically the world champion in one game doesn't really allow a lot of time for competitive play in another. Regardless, I think this case probably represents a very, very significant exception rather than the rule.

@LaserGuy Yep, thank you. There were others japanese top shogi players too, now I did see that chessbase has more articles about it. But you are right, these are exceptional cases. Even then, it is more natural for someone successful in a highly tactical game to be very strong in chess in no time after learning the rules than someone who never played any game at all.

Nowadays to be on the top level in chess you need amazing, incredible talent and long years of practice with other top players. The story of Capablanca, who learnt chess himself as a kid while observing his father's games, then immediately went to beat chess masters is now impossible to repeat.