Estimating Magnus Carlsen's IQ - by Sebastian Jensen
For whatever reason the commonly accepted IQ of magnus carlsen is 190 - I think this is because people seem to think chess is highly g-loaded, when in reality it is not (r = .32 in unranked samples). Even if you make some generous assumptions about measurement error, I doubt the true correlation is higher than .45 in random people. Notably, Kasparov's IQ was tested at 135, vindicating my belief that a lot of these IQ estimates of prominent scientists/politicians/chess players/philosophers are bogus.
Magnus Carlsen currently stands as the best chess player, putting him at a z-score of 5.93 in chess skill (assuming pop of 605M).
Apparently Carlsen reached #10 out of 7M in fantasy football, a z-score of 4.68.
Currently assuming a g-loading of the rank of fantasy football of 0.4, and a g-loadedness of chess skill of 0.4.
Based on simulations, the mean and SD in IQ of a person with that rank in fantasy football is about 2.1 and 0.86 in z-score notation. Regressing his chess rank onto that yields an estimate of 151.
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