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What is the IQ of Vishwanathan Anand

If you look around the web, you’ll find that every elite player has an IQ over 180. These were lower before the internet when the claims had to be made in books and articles with editors having some oversight. The reason for the IQ inflation is that none of the claims are based on testing.
Garry Kasparov took a test under the supervision of Spiegel, a German magazine. It was just above 130. Hikaru Nakamura did a self-test while streaming (not a good way to get an accurate result) and came up with 102.
All these claims that one finds on the internet are based on the assumption that IQ and chess skill are strongly linked. Actual research by psychologists (the scholars for whom Intelligence is an academic specialty) found that at best there is a weak correlation. There is a moderate correlation with some aspects of the test, especially math. But surprisingly no correlation to spatial aptitude. GMs do have exceptional memories, as do most prodigies in fields like music.

As a psychologist who has studied and administered many an IQ test, Id add that it very much depends which test you use. The mainstream ones are based around general IQ, combining various factors including verbal IQ. While more specific tests would only target ones ability at pattern recognition, memory etc.
I'll admit I havent read the literature on this topic in regards to Chess, but even if Hikaru was only at 102 (which I highly doubt) he might actually be closer to 150 on the aspects that would translate to Chess, and 50 on the areas that dont. That is of course entirely speculation. But my point here is that IQ has sub-categories.
Id still love to see a list of top players with their ratings along side their IQs (with a breakdown of the various sub-categories for a clearer understanding)

Id still love to see a list of top players with their ratings along side their IQs (with a breakdown of the various sub-categories for a clearer understanding)
There are plenty of these lists, but all, or nearly all, of the scores are speculative. They are not based on tests, but on the assumption that chess skill indicates high IQ.

its just assumed none of it is based on evidence
plus the stream where Hikaru did one was probably not even a legit IQ test

Iq and chess are not correlated I believe
They are weakly correlated, especially among young players.

I just found out this morning that Vishy Anand never reached #1 on the fide rating list. #2 was the highest ranking he reached. I figured at some point he had reached the top spot, even briefly, because his rating got to about 2817 or so but unfortunately for him The Magster was on the scene by that point.

In this world everything can have a correlation... a fish can have a correlation with a feather... Just think that a bird can release a feather flying up the ocean... The ocean of your choice... the connecting bridge in this case is the sea... One of the Apollo missions discovered a stone on the moon with a small piece of planet earth fragment contained in the stone.Apollo XIV, "Big Bertha stone"

I just found out this morning that Vishy Anand never reached #1 on the fide rating list. #2 was the highest ranking he reached.
But it's not true.
Here is an example:
https://ratings.fide.com/toparc.phtml?cod=113

...One day a person became so intelligent that no one could pigeonhole him, decipher him or study him under any system.Is simply impredictable and indomit.It is rumored that he sometimes likes to play chess.

I just found out this morning that Vishy Anand never reached #1 on the fide rating list. #2 was the highest ranking he reached.
But it's not true.
Here is an example:
You're right. I guess the way I worded it when googling it gave me a wrong info link.

Sorry for chess lovers,myself includded,but I discovered a correlation inbetween the unsmartly and chess.Fortunatelly is not a general rule.The point is that seems a constant ,that people trying to imitate Chess heroes and others ideals,as their styles / openings, lose their own creativity.I call that chess walkers,on alusion to Walking Dead serie.I reject use Zombi word,because is a spiritual cultural term and I have full reverence for Haitian Creole culture and African branches
He was the world's leader but no one knows what his hidden IQ is.