Bobby Fischer In July–August, Fischer crushed the mostly grandmaster field at Buenos Aires, winning by a 3½-point margin, scoring 15/17 (+13−0=4). Fischer then played first board for the US Team in the 19th Chess Olympiad in Siegen, where he won an individual Silver medal, scoring 10/13 (+8−1=4), with his only loss being to World Champion Boris Spassky. Right after the Olympiad, Fischer defeated Ulf Andersson in an exhibition game for the Swedish newspaper "Expressen". Fischer had taken his game to a new level. Fischer won the Interzonal (held in Palma de Mallorca in November and December 1970) with 18½/23 (+15−1=7), far ahead
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