World Chess Championship 1966 - Wikipedia

The Petrosian-Spassky World Championship Match (Moscow, 1966), with annotations by Tal, Boleslavsky, Bondarevsky, etc.

1971 Buenos Aires, ARG - Fischer vs Petrosian – Chess Universe

The chess games of Boris Spassky

Tigran Petrosian (June 17, 1929 – August 13, 1984) - Chess Giants - CHESS POWER

Play Like Tigran Petrosian - Chess Lessons

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

Historical riddle: Was Fischer's 22.Nxd7 winning?

A very happy birthday to Boris Vasilijevich Spassky, a true Gentleman and World Chess Champion, and the only man I've ever owned a framed picture of. A little late, but here in

Pal Benko, Who Stepped Aside for Bobby Fischer, Dies at 91 - The New York Times

Neuvěřitelný masakr mistra světa ve 24 tazích: Spassky vs. Petrosian (zápas o MS 1969)