Garry Kasparov and Anatoly Karpov

Garry Kasparov and Anatoly Karpov during the 1st match for the world chess championship, 1984.

Former World Chess Champion, Garry Kasparov, right, talks to the media as FIDE presidential candidate and former World Chess Champion, Anatoly Karpov, left, and President of English Chess Federation, CJ de Mooi

Forget the treadmill: An intense game of chess can burn hundreds of calories, research suggests

Kasparov - Karpov World Championship Match (1987) chess event

Karpov - Kasparov World Championship Match 1984/85 chess event

Kasparov - Karpov World Championship Rematch (1986) chess event

Chess Grandmaster Karpov Hospitalized After Mysterious Fall

Anatoly Karpov - Wikipedia

Garry Kasparov's Exciting Life - Alberto Chueca - High Performance Chess Academy

Anatoly Karpov vs Garry Kasparov Championship Match, 1985