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
Bobby Fischer way to force a draw, yet "sealed a different, wrong move", and lost. "Chess publications around the world wrote of the unparalleled achievement. Only Bent Larsen, always a Fischer detractor, was unimpressed: 'Fischer was playing against children. Fischer, eligible as US Champion, decided against his participation in the 1964 Amsterdam Interzonal, taking himself out of the 1966 World Championship cycle, even after FIDE changed the format of the eight-player Candidates Tournament from a round-robin to a series of knockout matches, which eliminated the possibility of collusion. Instead, Fischer embarked on a tour of the United States and Canada from February