Chess right of a deposed champion to a rematch, and the next champion, Armenian Tigran Petrosian, a player renowned for his defensive and positional skills, held the title for two cycles, 1963–1969. His successor, Boris Spassky from Russia (champion 1969–1972), won games in both positional and sharp tactical style. The next championship, the so-called Match of the Century, saw the first non-Soviet challenger since World War II, American Bobby Fischer, who defeated his Candidates opponents by unheard-of margins and clearly won the world championship match. In 1975, however, Fischer refused to defend his title against Soviet Anatoly Karpov when FIDE did
Bobby Fischer 1965 championship, culminating in a total score of 74/90 (61 wins, 26 draws, 3 losses). Fischer refused to play in the 1958 Munich Olympiad when his demand to play ahead of Samuel Reshevsky was rejected. Some sources claim that 15-year-old Fischer was unable to arrange leave from attending high school. Fischer later represented the United States on first board at four Men's Chess Olympiads, winning two individual Silver and one individual Bronze medals: Out of four Men's Chess Olympiads, Fischer scored +40−7=18, for 49/65: 75.4%. In 1966, Fischer narrowly missed the individual gold medal, scoring 88.23% to World Champion Tigran