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
20th Chess Olympiad 20th Chess Olympiad The 20th Chess Olympiad, organized by FIDE and comprising an open team tournament, as well as several other events designed to promote the game of chess, took place between September 18 and October 13, 1972, in Skopje, Yugoslavia (present-day Macedonia). For the first time, the Soviet team only comprised 5 GMs and one IM (Savon). Since Bobby Fischer had beaten Spassky earlier in the year, the team wasn't led by the current world champion – also a first. It did, however, feature three previous (Smyslov, Tal, and Petrosian) as well as one future champion (Karpov). The team