Three years after Petrosian had earned the title of World Chess Champion, he was challenged by Boris Spassky
Text from Wikipedia, available under CC BY-SA 4.0.
- #wikipedia
- #event
Three years after Petrosian had earned the title of World Chess Champion, he was challenged by Boris Spassky
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.