Yes, that study showed GMs performing only slightly better for random
positions. On the other hand, many of the best GMs like Fischer
(tragic later life), Kasparov and Judit Polgar on the women's side had
a prodigious memory as well as phenomenal IQs. From what I remember,
Fischer and Kasparov were in the 180s and Polgar was in the 170s. Of
course, it's hard to assess the validity of these tests since they
were probably different (Kasparov even had a significantly lower score
on another IQ test, but there is variance too), for different ages and
with different standards, but the overall result is the same. The best
chess players in the world excelled. In fact, if they didn't, I'd be
more inclined to think the tools were faulty. Similarly, if a
remarkable person like Richard Feynman doesn't score as high as we'd
expect on the IQ spectrum, my feeling is not that this person is less
intelligent than we thought but that our tools do not accurately
represent his intelligence. After all, IQ tests are supposed to be
predictors of intelligence which is associated with accomplishment in
intellectual domains. If one has made tremendous progress in the
difficult field of quantum mechanics, he has established his
intelligence in a much more tangible way than a number on an IQ test.
As a chess player, I'm certainly biased, but I'd be surprised if chess
did not produce some quantifiable cognitive benefit. To play chess
well, one must have a good memory (and not just for openings or
endgames!), excellent pattern recognition, intense focus, strategic
thinking/concept, discipline (except for blitz) and the ability to
visualize/calculate deeply when necessary. From all of these (and this
is just an abbreviated list), I think pattern recognition is most
essential. A good chess player will know and be able to apply tens of
thousands of typical patterns along with their intricate features (for
example knowing the conditions of the Greek gift sacrifice). This type
of thinking is also what is stressed on IQ tests and most learning. It
may be that chess uses too many aspects of the brain to make a clear
improvement easily measurable. Tetris, video games and even DNB all
have a pretty narrow focus. It is like strenuous exercise of a
particular muscle. Chess is more like going swimming. :D I could
easily write a book about chess and its effects on cognition so I will
try not to sidetrack the thread any farther.
On Sep 1, 8:32 pm, Gwern Branwen <
gwe...@gmail.com> wrote: