Clash of Champions: Spassky vs. Petrosian

For the first time since Alekhine, there was a world champion not named "Botvinnik" who was also not merely renting the title for a year. The Armenian named Tigran Petrosian held the title of world champion, with his unusual, "left-handed" style of quiet positional play and sharp tactics. Petrosian's

The 12 Greatest Chess Players of All Time - Chessable Blog

The Petrosian-Spassky World Championship Match (Moscow, 1969), with annotations by Tal, Korchnoi, Boleslavsky & Bondarevsky.

Party Animal: the lost triumph of Tigran Petrosian

Bobby Fischer 1971

When Boris Spassky was captured by the Fischer king - The New European

Tilburg chess tournament - Wikipedia

Chess: Teenager Alireza Firouzja aiming to be youngest ever world champion, Chess

Why do world champion chess matches (as depicted in The Queen's Gambit show on Netflix) have clocks? Can you lose the world championship on time? - Quora

Tigran V Petrosian vs Boris Spassky (1966) Fit to be Tied

Viktor Korchnoi

Karpov prepares for Fischer