| gptkbp:notableAchievement | World Chess Champion (1969–1972) defeated Tigran Petrosian for World Championship
 lost World Championship to Bobby Fischer (1972)
 played in 10 Chess Olympiads for USSR
 played in 8 Candidates Tournaments
 won USSR Chess Championship (1961, 1973)
 youngest Soviet chess champion (1956)
 
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