In all, Korchnoi was a candidate for the World Championship on ten occasions (1962, 1968, 1971, 1974, 1977, 1980, 1983, 1985, 1988 and 1991). Korchnoi was also a four-time USSR chess champion, a five-time member of Soviet teams that won the European championship, and a six-time member of Soviet teams that won the Chess Olympiad.