Chess Player iq

That's really amazing that Morphy took a clinically approved IQ test before modern psychology was even developed. Truly a genius!
How plausible is it that in an objective mental contest a world champ, especially one with longevity (although one win is quite enough and of course indicates many good results) would be less than an obvious genius, probably able to have done something significant in any other field requiring brains? Hell, I would say that even a very good baseball or basketball player is likely to be above average in intelligence. If a chess world champ were actually average in general, but had only chessic ability that somehow could not be applied elsewhere, that would be the amazing thing and there is zero evidence of idiot savants in chess, absolutely zero. Every world champ has been a great genius with evidence that they could do other things. Fischer's memory was superhuman, for example.
I have to say that IQ tests written by non-world-class intellects are questionable. I would guess that Reshevsky/Capablanca being given any standardized test at 4 would have performed like an 8 year old and so 200 easy. How many digits could Morphy remember? Etc. World champs are by definition one in many millions (given that not everyone plays chess and not that many devote serious time to it).

What is the source of these numbers or did you just make them up?
A person on the internet making things up? How preposterous

It doesn't make a lot of sense to try to measure IQ at 180 and above. Only 50 in every billion people are in that range. There's no good way to calibrate a test for such a tiny fraction of people. However, there's certainly a case to be made that Albert Einstein was the most intelligent person to have existed simply due to his body of work, in particular his discovery of the General Theory of Relativity. Anyone who has taken the time to learn it finds themselves in complete awe of how he arrived at it. 108 years later and only a small minority reach the level of being able to understand it, even when carefully explained.