Tigran's Fortress, Fischer vs Petrosian, (1971)

In chess, is it allowed to force draw by repetition when the other player is in a winning position? - Quora

The Day Bobby Blew It

Pirc Defense Archives - Chess Essentials

Bobby Fischer vs. Tigrán Petrosián (1971)

Robert James Fischer vs Tigran V Petrosian (1971) Mad TV

International Chess Federation on X: Then 15-year-old Bobby Fischer and yet-to-be world champion Tigran Petrosian play some friendly blitz at Moscow Central Chess Club in 1958. Today is 90 years since Armenian

The Fischer-Petrosian Candidates' Final (Buenos Aires, 1971) with annotations by Korchnoi, Furman, Kholmov & Polugaevsky.

Glossary of Chess Terms

50 Years Later: Why Fischer Vs. Spassky Was The Greatest World Championship Match

Chess Room Newsletter #929

Petrosian could have held!