Chess ability IQ based on one's rating is likely to be difficult to assess, my over the board rating at my peak some 15 years ago was 1927, had long break and came back 5 years ago playing over the board and got my rating up to 1730 I started training to play Blindfold chess and slowly over time got myself up to playing 6 boards blindfolded then dreaded covid hit and ended my over the board chess playing now only play for fun on 3 online sites!?
What does your chess rating say about your overall IQ?


There is no such correlation between IQ and rating progress.
One deciding factor is how much work you put into it, here assumed 2 hours / day Even so , is that 5/6/7 days per week?
Another deciding factor is what exactly you do. Some chess related activities are worthless for progress: playing speed chess, analysing won games, opening study, watching videos...
Vast majority of chess is memorisation, IQ is bollocks in regards to chess relationship, that's why kids are so good, they have no responsibilities in life and plenty of time on their hands whilst soaking up new info like a sponge. Adults do not, starting at adulthood therefore much more difficult. All the openings and end games have been determined, just a matter of learning them, middle game is just coming up with simple plans and spotting tactics, again you need the time to practice, the more time on your hands, the better you generally are at chess. People trying to think they're very bright whilst grinning like a Cheshire cat just because of some arbitrary numbers invented by some chess elo geek, are amusing You don't have a PHD, the only PHD you do have is in procrastination, that's it.

Vast majority of chess is memorisation, IQ is bollocks in regards to chess relationship, that's why kids are so good, they have no responsibilities in life and plenty of time on their hands whilst soaking up new info like a sponge. Adults do not, starting at adulthood therefore much more difficult. All the openings and end games have been determined, just a matter of learning them, middle game is just coming up with simple plans and spotting tactics, again you need the time to practice, the more time on your hands, the better you generally are at chess. People trying to think they're very bright whilst grinning like a Cheshire cat just because of some arbitrary numbers invented by some chess elo geek, are amusing You don't have a PHD, the only PHD you do have is in procrastination, that's it.
Whilst chess elo does not directly correlate with intelligence, there are many people in the world that think so and that gives you something to brag about to those who don’t know any better

There are so many different aspects to what one could consider intelligence. There are many animals who are more capable and can calculate faster than a human. Squirrels can remember where their nuts are better than most humans.
Some people have excellent memories, but they may have relative difficulty processing data into a strategy or tactic.
That's the beauty of chess. It challenges different aspects of how our individual brains work. Figuring out how to improve certain aspects can have a direct affect on how we play the game, let alone other facets of our lives.
Some of us; ie. Magnus Carlson, may have brains that are innately better than most of us could ever possess. Somewhere in the continuum are the rest of us, moving back and forth along it.

Nothing--there is no direct correlation between IQ and chess. I've seen brilliant people suck at chess and average Joes become strong masters.

Chess is no measure of intellect whatsoever, as Fischer said, it's nearly all pre-arranged, it's nearly all memorisation, at the top level especially, barely any creativity left, you watch titled tuesday, in some lines in less than 10 moves they're declaring it's a draw FFS, because both players know the theory so well there's no way either side would win.
An IQ test is simply the best way of determining intelligence, because it mostly deals with logic.
Chess is no barometre for success when it comes to intellect prowess - it's simply a glorified test of memory.

There is a correlation between IQ and chess skills. Although it is a little more complicated. Only a certain part of IQ is largely relevant to chess. If someone scores high in this part, there is a high probability that they will score high in other parts as well. However, it is not necessarily the case. There are individuals who might score average in overall IQ and still score high on this particular part. This may be the case for Hikaru.

The original question is not whether intelligence may aid in learning chess, but whether there is a direct correspondence between IQ and elo rating. The idea that so-and-so has a rating of 1150 so they CAN'T have a high IQ, or Nakamura is a top GM so he MUST have an extraordinarily high IQ is baseless poppycock.

Of course there are grounds to believe that a quick intellect can be helpful in learning chess. To say that is the ONLY thing that counts, that all people with 125 IQs will become stronger players than those with 105 IQs, and only those with 170+ IQs can aspire to be top GMs IS tommyrot. Work ethic, quality of coaching (especially when first learning) ability to maintain high levels of concentration over long stretches, performance anxiety, willpower, visual memory, visualization ability, many other factors go into one's chess performance; and there is NO evidence that IQ is so paramount as to entirely outweigh all other factors combined.
if there was a correlation between IQ and chess, people who are high IQ should excel in chess, even if they pick it up relatively late in their lives, except this is not the case, all the really good chess players started at a very young age, so they have many many years of experience and same patterns and soforth memorized gazillion of positions and lines, at that it is all to it in chess, sure if you have a natural talent for memorizing patterns or you're a quickthinker, you have an edge, but you still have ot memorize tons of lines, endgame patterns, tactics etc etc, so IQ is pretty much irrelevant here
*Considering you play chess 2 hours a day and do not participate in professional chess, this is the connection between the rating you gain in 1 year and your IQ, assuming that your beginning elo is 0
-From 0 to 800-1400: 90-110 IQ (average intelligence)
-From 0 to 1400-1600: 110-125 IQ (above average intelligence or smart)
-From 0 to 1600-2000: 125-135 (moderately gifted or very smart)
-From 0 to 2000+ : 135-160 (genius)
P/s: while this might not apply to everyone, it is generally acceptable.