Trivia

He was one of the few who defeated eight world champions, from Max Euwe to Garry Kasparov.

He participated in the USSR Championships six times without losing a single game, which is a unique achievement in the history of the tournament.

In 1968, he defended his PhD thesis in philosophy on the topic "Some Problems of the Logic of Chess Thinking", which once again emphasizes his deep understanding of chess as not just a game, but a philosophical and logical process.

In 1964, Arpad Elo released the first unofficial international Elo rating list, which was topped by Petrosian and Bobby Fischer with ratings of 2690.

At the age of fifty, he became (together with Portisch and Hübner) the winner of the Interzonal chess tournament.

Petrosian is considered to be the best player in the world at using his pawns in attack and defense.

In 2004, FIDE declared a year in memory of Tigran Petrosian, in honor of which the Tigran Petrosian medal was established, rewarding trainers for special achievements.

Two famous systems bear his name: the Petrosian Variation in the Queen's Indian Defense and the Petrosian System in the Old Indian Defense.

At ten World Chess Olympiads, held from 1958 to 1978, he showed an incredible result: he won 79 times, drew 50 times and lost only once. This indicator remains one of the best in the history of the Chess Olympiads.