How can we reconcile that with the rest of our picture of the world, and how obsessed should we be with getting a copy of Laszlo Polgar’s book? Let’s get this out of the way first: the Polgar sisters were probably genetically really smart.The whole family was Hungarian Jews, a group with a great track record.
And it’s just barely plausible that some sufficiently smart people might have three kids who all have IQs in the high 120s and low 130s. 2% of people have IQs in the high 120s or low 130s, but 2% of people aren’t the top-ranked female chess player in the world. “Practice” seems like an obvious part of the picture.
J Levitt proposes an equation to estimate a chess player’s IQ from their chess score.
It suggests that chess grandmasters probably have IQs above 160.
Someone summed up my previous post as “Hungarian education isn’t magic”.
I would amend that to read “Hungarian education isn’t systemically magic”.