Bobby Fischer games, the only perfect score in the history of the tournament. His book "My 60 Memorable Games", published in 1969, is regarded as a classic work of chess literature. He won the 1970 Interzonal Tournament by a record 3½-point margin, and won 20 consecutive games, including two unprecedented 6–0 sweeps, in the Candidates Matches. In July 1971, he became the first official FIDE number-one-rated player. Fischer won the World Chess Championship in 1972, defeating Boris Spassky of the USSR, in a match held in Reykjavík, Iceland. Publicized as a Cold War confrontation between the US and USSR, it attracted more
Interregnum of World Chess Champions Anatoly Karpov after Bobby Fischer), the Interregnum currently remains the only period in the history of modern chess in which there was no World Champion. There was a similar interregnum of the Women's World Chess Championship, between Vera Menchik's death in 1944 and Lyudmila Rudenko winning the championship in 1950. Interregnum of World Chess Champions The Interregnum of World Chess Champions was the period between March 24, 1946 (the date of Alexander Alekhine's death) and May 17, 1948 (when Mikhail Botvinnik won a special championship tournament). When Alekhine suddenly died in 1946, the title of World Chess Champion became vacant