Kenya Chess Masala: Viktor Lvovich Korchnoi - The Indomitable Lion

Quem joga muito xadrez tende a ficar mais inteligente?

Why is it that Garry Kasparov has a really high IQ? - Quora

Anatoly Karpov - Wikipedia

Anatoly Yevgenyevich Karpov

Bobby Fischer - Chess, IQ & Death

Chess's chequered history - The New European

780 Playing Chinese Chess Stock Photos, High-Res Pictures, and Images - Getty Images

Both grandmaster and PhD/doctorate (not sure Hou Yifan counts) : r/chess

FIDE allocates - FIDE - International Chess Federation

Karpov Chess school computer - Schaak en Gowinkel het Paard - Spellen en Puzzels sinds 1987