Boris Spassky Boris Spassky Boris Vasilievich Spassky (; born January 30, 1937) is a Russian chess grandmaster. He was the tenth World Chess Champion, holding the title from 1969 to 1972. Spassky played three world championship matches: he lost to Tigran Petrosian in 1966; defeated Petrosian in 1969 to become world champion; then lost to Bobby Fischer in a famous match in 1972. Spassky won the Soviet Chess Championship twice outright (1961, 1973), and twice lost in playoffs (1956, 1963), after tying for first place during the event proper. He was a World Chess Championship candidate on seven occasions (1956, 1965, 1968,
Bobby Fischer Chess Championship. Therefore, I resign my FIDE World Chess Championship title. Sincerely, Bobby Fischer. The delegates responded by reaffirming their prior decisions, but did not accept Fischer's resignation and requested that he reconsider. Many observers considered Fischer's requested 9–9 clause unfair because it would require the challenger to win by at least two games (10–8). Botvinnik called the 9–9 clause "unsporting". Korchnoi, David Bronstein, and Lev Alburt considered the 9–9 clause reasonable. Due to the continued efforts of US Chess Federation officials, a special FIDE Congress was held in March 1975 in Bergen, Netherlands, in which it was accepted that