IBM international chess tournament

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.

Parallel there was quite often a tournament IBM-B, always with (future or former) strong grandmasters - and local Dutch players to play against foreign titleholders, apart from the major "A" section. By 1963, there were 120 participants in the IBM Amsterdam tournament, broken down to grandmaster group, master group, reserve master group, etc. It was a real festival, connected with the idea to promote (chess) programming by sponsor IBM.

Albin Planinc (left) vs. Boris Spassky in 1973

IBM 1966: Mikhail Botvinnik

IBM 1977: Tony Miles

#	Year	Winner
1	1961	Kick Langeweg (Netherlands)
2	1962	Moshe Czerniak (Israel) Hiong Liong Tan (Indonesia)
3	1963	Lajos Portisch (Hungary)
4	1964	Bent Larsen (Denmark)
5	1965	Jan Hein Donner (Netherlands)
6	1966	Mikhail Botvinnik (USSR)
7	1967	Lajos Portisch (Hungary)
8	1968	Lubomir Kavalek (Czechoslovakia)
9	1969	Lajos Portisch (Hungary)
10	1970	Boris Spassky (USSR) Lev Polugaevsky (USSR)
11	1971	Vasily Smyslov (USSR)
12	1972	Lev Polugaevsky (USSR)
13	1973	Tigran Petrosian (USSR) Albin Planinc (Yugoslavia)
14	1974	Vlastimil Jansa (Czechoslovakia) Vladimir Tukmakov (USSR) Borislav Ivkov (Yugoslavia)
15	1975	Ljubomir Ljubojević (Yugoslavia)
16	1976	Viktor Korchnoi (Switzerland) Tony Miles (England)
17	1977	Tony Miles (England)
18	1978	Jan Timman (Netherlands)
19	1979	Vlastimil Hort (Czechoslovakia) Gyula Sax (Hungary)
20	1980	Anatoly Karpov (USSR)
21	1981	Jan Timman (Netherlands)

References

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IBM chess tournament from endgame.nl
IBM chess tournament from Eric Delaire (full crosstables)

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Major invitational recurring international chess tournaments
Strong chess tournaments Mini chess tournaments Round-robin chess tournaments
Major present (average rating > 2700; round-robin system)	Biel Chess Festival (since 1968) Dortmund Sparkassen Chess Meeting (since 1973) Grand Chess Tour (since 2015) Grenke Chess Classic (since 2013) London Chess Classic (since 2009) Norway Chess (since 2013) Shamkir Chess (since 2014) Sinquefield Cup (since 2013) Tal Memorial (since 2006) Tata Steel Chess Tournament (since 1938) Zurich Chess Challenge (since 2012)
Other present (Swiss system generally)	Aeroflot Open (since 2002) Australasian Masters (since 1987) Canadian Open (since 1956) Capablanca Memorial (since 1962) Cappelle-la-Grande Open (since 1985) Carlos Torre Repetto Memorial (since 1987) Chigorin Memorial (since 1909) Doeberl Cup (since 1963) Dubai Open (since 1999) Gibraltar Chess Festival (since 2003) Hastings International Chess Congress (since 1920) Lublin (since 2009) Paul Keres Memorial (since 1969) Qatar Masters Open (since 2014) Reykjavik Open (since 1964) Riga Technical University Open (since 2011) Rubinstein Memorial (since 1963) South African Open (since 1962) U.S. Open Chess Championship (since 1900) Vidmar Memorial (since 1969) Vlissingen (since 1995) World Open (since 1973) Xtracon Chess Open (since 1979) Zurich Christmas Open (since 1977)
Recently cancelled (after 2000)	Alekhine Memorial (1956–2013, irregular) Acropolis (1968–2009) Aerosvit (2006–2008) Amber (1992–2011) Bilbao Chess Masters Final (2008–2016) Howard Staunton Memorial (2003–2009) Linares (1978–2010) Mar del Plata (1928–2001) Millionaire Chess (2014-2016) M-Tel Masters (2005–2009) North Sea Cup (1976–2008) Pearl Spring (2008–2010) Reggio Emilia (1947–2012)
Major past (19th–20th century)	American Chess Congress (1857–1923) Carl Schlechter Memorial (1923–1996) DSB Congress (1879–1932) General Government (1940–1944) IBM international (1961–1981) Konex (1977–1994) Leopold Trebitsch Memorial (1907–1938) Lone Pine International (1971–1981) Max Euwe Memorial (1987–1996) Monte Carlo (1901–1904; 1967–1969) Netanya (1961–1983) Palma de Mallorca (1965–1972) Phillips & Drew Kings (1980–1986) Piatigorsky Cup (1963–1966) San Sebastián (1911–1912) Silesian Chess Congress (1922–1939) Tilburg (1977–1998) Triberg (1914–1917)
Chess competitions National championships Supranational championships

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IBM international chess tournament

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References