The IBM international chess tournament was a series of very strong chess tournaments held in the Amsterdam, Netherlands from 1961 to 1981, and was sponsored by IBM. The list of winners of the main group includes five world champions.
# Year Winner 1 1961 2 1962 3 1963 4 1964 5 1965 6 1966 7 1967 8 1968 9 1969 10 1970 11 1971 12 1972 13 1973 14 1974 15 1975 16 1976 17 1977 18 1978 19 1979 20 1980 21 1981
See also List of strong chess tournaments AVRO 1938 chess tournament
Max Euwe Memorial Tournament
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