World Chess Championship 1978 - Wikiwand

The 1978 World Chess Championship was played between Anatoly Karpov and Viktor Korchnoi in Baguio, Philippines from July 18 to October 18, 1978. Karpov won, thereby retaining the title.

Korchnoi-Karpov, World Championship 1978

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1978, Thy Name is Drama - Chess Forums

World Chess Champions by Country (info in comments) : r/chess

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The dirtiest chess match in history': Stean on Karpov-Korchnoi

World Chess Champions by Country (info in comments) : r/chess

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The dirtiest chess match in history': Stean on Karpov-Korchnoi