Viktor Korchnoi was a Russian chess grandmaster born on March 23, 1931. He is considered one of the greatest chess players in history, known for his fierce competitive spirit and strategic play. Korchnoi had a long and successful career, competing against many world champions and participating in numerous tournaments. His contributions to chess have been recognized worldwide, and he remains a respected figure in the chess community. Korchnoi passed away on June 6, 2021, leaving behind a legacy in the world of chess.