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 is the future world champion! Fischer demanded to play against Mikhail Botvinnik, the reigning World Champion. When told that this was impossible, Fischer asked to play Keres. "Finally, Tigran Petrosian was, on a semi-official basis, summoned to the club..." where he played speed games with Fischer, winning the majority. "When Bobby discovered that he wasn't going to play any formal games... he went into a not-so-silent rage", saying he was fed up "with these Russian pigs", which angered the Soviets who saw Fischer as their honored guest. It was then that the Yugoslavian chess officials offered to take in Fischer