In chess as in life there is something called Brute Force.
Brains vs Brawns
While the person with the Brains so to speak might have a better chance of defeating the player with Brawns.
The simple fact is if the Brawns player was to find himself ahead by a piece for example. It does not matter how smart the other player is.
There comes a point when that player would lose by Brute Force.
For example:
Black can win this. It does not matter how smart white is or how dumb white is. Black can force a win.
White may try to use his superior mind to resist the best he can.
However, if his oppoent does not messes up. Than He will lose.
Do you think if you gave Magnus Carlsen this position as white and a player rated 1000 this position as black.
Do you think Magnus would pull off some amazing move to avoid checkmate?
No he would not! He would hope for his opponent to blunder and if his opponent doesn't. He would suffer defeat. It is that simple.
Is there an upper limit in chess?
Yes there is an upper limit in chess but even they are bound by the rules and perimeters of the game.
You have your answer Sir.
well there are people in the 1000 range that dont know how to mate this... so yea I believe that magnus could end up in a draw or in an infinate play against quite a few 1000's in this position :P
but what bugs me in your argument is that you used an already concluded game, I mean for example magnus would never end up king against rook with a 1000 player... so i suppose a 5000(imaginary player) would never reach this scenario against magnus... if he would (or if a 10000 player against the 5000 player and so on ) then we reach to the conclusion I already mentioned in my last post.
"Concentrate on material gains. Whatever your opponent gives you take, unless you see a good reason not to."
-Bobby Fischer
"It’s just you and your opponent at the board and you're trying to prove something."
-Bobby Fischer
"Chess is war over the board. The object is to crush the opponent's mind."
-Bobby Fischer