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 play Spassky (then tied for 96th–102nd on the FIDE rating list) in a "Revenge Match of the 20th century" in 1992. This match took place in Sveti Stefan and Belgrade, Yugoslavia, in spite of a United Nations embargo that included sanctions on commercial activities. Fischer demanded that the organizers bill the match as "The World Chess Championship", although Garry Kasparov was the recognized FIDE World Champion. Fischer insisted he was still the true World Champion, and that for all the games in the FIDE-sanctioned World Championship matches, involving Karpov, Korchnoi, and Kasparov, the outcomes had been prearranged. The purse for