Relationship between Chess rating and I.Q?

More speculative nonsense. If this were true, Frank Brady could source it. He failed.

The New York Times sourced the claim. They said that it was Frank Brady’s assertion. It is a fact that Brady makes the claim in his two biographies of Fischer. It is not a fact that Brady is correct.

It's my belief that Fischer didn't do an IQ test and the 180 was estimated.

Einstein wasn't as smart as you may imagine. There have been many cleverer scientists.

In one of Brady’s books, he offers the claim that a counselor at his school saw some standardized test scores upon which this estimate is based. The school employee is not named, nor is the standardized test. AFAIK, no standardized test given in schools in the 1950s included IQ scores in the results. Nor could such a test yield an IQ score that high.

Martin_Stahl 
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#2
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When asked about the relationship between chess and intelligence, Bobby Fischer said, "the only thing being good at chess means is that you are good at chess." If THAT doesnt tell you all you need to know, nothing will.

I remember reading a rather hazy account which was similar. It claims that someone saw some answers to test questions and from those results made a guess at his likely IQ. I do not think that the guess was 180 but that isn't important, since it was not a controlled test in any way.

Fischer (and all other children in New York City in the 1950s) did take an IQ test. Those test results were confidential, have never been released, and by now no longer exist.

Substantially, the formula for the iq is in fact wrong. If you Do the math: if elo=2000, then IQ= 100+(15x(2000-1200) /200). So, IQ=100+(15x800/200). Finally, IQ=100+60, so IQ=160, which means a 2000 will have an IQ of 160, which is highly debetable. This means that I, which have an elo of 1113 rapid I'd have an IQ below 100 (which isn't true in any way). This formulae are complitely wrong, in my opinion.

Inasmuch as the basic assumption--that chess rating and IQ are directly linked--is wrong there is no way to come up with a workable formula.

In common with the other children in my county in the UK I took an IQ test when I was 9. As you say, the results were confidential. I was told, however, that I was the second highest recorded IQ in the county and it was "over x amount" and that's all they'd say. They made a long trip to look at me for that reason, apparently.

Indeed, I spent an hour looking at it and concluded that it's completely impossible to produce a genuine formula and all that is possible is to produce an artificial formula which would be the mathematical expression of known correlations. To do it properly, it would be necessary to understand which mental factors produce which results regarding chess ability and that isn't known ... only guessed at. Then it would only be a matter of weighting the theory correctly, rather as in Game Theory.

As rare as it is, there seems to be some agreement between the two of you and to which I also assent.

Indeed.

Yeah, I was surprised to read some fairly coherent and restrained comments in this thread this morning! This thread is usually rife with hyperbole and bragging.

It's a pleasant surprise to see agreement!

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