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 makes him tick" and described him as "a troubled human being" with "obvious personal problems". Valery Krylov, advisor to Anatoly Karpov and a specialist in the "psycho-physiological rehabilitation of sportsmen", believed Fischer suffered from schizophrenia. Psychologist Joseph G. Ponterotto, from second-hand sources, concludes that "Bobby did not meet all the necessary criteria to reach diagnoses of schizophrenia or Asperger syndrome. The evidence is stronger for paranoid personality disorder." Magnús Skúlason, a chess player, psychiatrist and head doctor of Sogn Mental Asylum for the Criminally Insane, befriended Fischer towards the end of Fischer's life. From "Endgame", Fischer's 2011 biography by Frank