Play Like A World Champion: Petrosian and Spassky - Chess Lessons

In 1963 Tigran Petrosian unseated Botvinnik as World Champion for the final time. Petrosian was a defensive genius and held his title again in 1966 against Boris Spassky. In 1969 Spassky won another candidates cycle and defeated Petrosian to take the title.

World Champion Calculation Training - Part 3: Petrosian & Spassky

Welcome to Elk and Ruby Publishing House

Petrosian's World Championship Immortal! - Best Of The 60s - Petrosian vs. Spassky, 1966

The Grossmeister Series Chess Pieces - 4.4 King

Tigran Petrosian Chess Products The Life, Chess Games and Products of World Champion Tigran Petrosian

World Chess Championship 1972 - Wikipedia

50 years ago: Fischer-Spassky, Secret weapons?

Tigran Petrosian's games v. Gurgenidze & Bannik (Spartak Team-ch, Moscow 1961).

World chess champion hi-res stock photography and images - Alamy