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 in the United States and around the world. Fischer's win was an American victory in a field that Soviet players – closely identified with and subsidized by the state – had dominated for the previous quarter-century. Kasparov remarked, "Fischer fits ideologically into the context of the Cold War era: a lone American genius challenges the Soviet chess machine and defeats it". Dutch grandmaster Jan Timman calls Fischer's victory "the story of a lonely hero who overcomes an entire empire". Fischer's sister observed, "Bobby did all this in a country almost totally without a chess culture. It was as if an