prize13-8, Exercise 2: A simplification

Model answer (check the details):

What is true: Fischer did end the run of Soviet world champions that had lasted since 1948, by beating the reigning champion, Spassky, 12.5 to 8.5 in 1972.

What is not: he beat one man in one match, not a system. He prepared with help and analysis, and he lost the first game and forfeited the second before winning. The Soviet system went on to produce champions such as Karpov and Kasparov, so it was not defeated, and a single result cannot test a whole system.

Care: the question is an exercise in separating a result from the story told about it.