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 worldwide interest than any chess championship before or since. In 1975, Fischer refused to defend his title when an agreement could not be reached with FIDE, chess's international governing body, over one of the conditions for the match. Under FIDE rules, this resulted in Soviet GM Anatoly Karpov, who had won the qualifying Candidates' cycle, being named the new world champion by default. After forfeiting his title as World Champion, Fischer became reclusive and sometimes erratic, disappearing from both competitive chess and the public eye. In 1992, he reemerged to win an unofficial rematch against Spassky. It was held in