Viktor Korchnoi plays chess against Karpov. News Photo - Getty Images

Karpov - Korchnoi 1978 World Championship Match - Chessentials

Viktor Korchnoi, chess grandmaster – obituary

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Campeonato Mundial de Xadrez de 1981 – Wikipédia, a enciclopédia livre

Anti-hero? Evgeny Vasiukov on Viktor Korchnoi

Books about Korchnoi and Karpov by Edward Winter

Kasparov pays tribute to Korchnoi

Jesse February on X: 1975, Fischer refused to defend his WC title against Karpov due to his dispute over the match format. 1978, Karpov played his first WC match, beating Korchnoi. 2023

Karpov - Korchnoi 1981 - Schachversand Niggemann

International Chess Federation on X: The famous Soviet, and then Swiss grandmaster Viktor Korchnoi was born #onthisday in 1931. A 10-time World Championship Candidate, he contested a Candidates final and two matches