Arpotrek: Keypusher, you're right, this game is a genuine detective mystery worthy of Sherlock Holmes London. If you like Sherlock Holmes and is willing to believe they really existed (and not only that was created by writer Arthur Conan Doyle), I can show the truth with immovable evidence of deduction. It's worth, here is attributed to defeat world champion chess player then to a stranger.
01) You must watch the game without knowing who each player several times and then must guess who is White and who is Black, based on the style of players, between Petrosian and Goltsman. The Black game is not imitable, Petrosian play as Black. The truth is that Petrosian won this game with Black and Goltsman lost wiht White.
02) This game corresponds to a tournament for teams within the Soviet Union, where each team representing an union trade of workers, in 1964. The database of this site has several games of Petrosian in the tournament, although references to the "event" are different or irregular. For example, "team", "Moscow Trade Union ch", "Moskva tt", "Ch URS (team)," "Ol Leningrad", "USSR Team ch", "Tallinn tt", and perhaps others presented simply as " Moscow ".
03) I play chess and so my brother. This site has games for both. A game is won by me on behalf of my brother, and a won game for my brother is in my name.
04) If you have doubts about this explanation, you can download free internet Sherlock Holmes novels after search by Google.