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Amsterdam IBM 1981
Compiled by suenteus po 147
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The twenty-first and final international chess tournament sponsored by IBM in Amsterdam, The Netherlands was held in May of 1981. This final edition saw invitations go out to eleven former winners of the event and one longtime participant, all of whom were (in order of ELO): Anatoli Karpov (2690), Lajos Portisch (2650), Lev Polugaevsky (2620), Jan Timman (2620), Ljubomir Ljubojevic (2605), Anthony Miles (2590), Vlastimil Hort (2575), Lubomir Kavalek (2550), Vasily Smyslov (2545), Hans Ree (2485), Jan Hein Donner (2475), and Kick Langeweg (2455). The average of the combined ratings of the participants qualified the tournament as a category XIII event. Timman triumphed over a strong field of champions (including the world champion) by finishing clear first, undefeated with +4. Karpov and Portisch tied for second, both having dropped a game. The final standings and crosstable are as follows:

01 Timman 7/11 * 1 1 1 1

02 Portisch 7/11 * 0 1 1 1 1

03 Karpov 7/11 * 0 1 1 1 1

04 Hort 6/11 1 * 1

05 Smyslov 6/11 1 * 1

06 Kavalek 6/11 0 * 1 1 1

07 Ree 6/11 0 * 1 1

08 Ljubojevic 5/11 0 0 * 1

09 Miles 5/11 0 0 0 * 1 1

10 Polugaevsky 4/11 0 0 *

11 Donner 2/11 0 0 0 0 0 0 0 * 1

12 Langeweg 2/11 0 0 0 0 0 0 0 *

Round One, Game #1
K Langeweg vs Miles, 1981
(A46) Queen's Pawn Game, 39 moves, 0-1

Round One, Game #2
Hort vs Karpov, 1981 
(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 26 moves, 1-0

Round One, Game #3
J H Donner vs Timman, 1981
(E41) Nimzo-Indian, 27 moves, 0-1

Round One, Game #4
Kavalek vs Ljubojevic, 1981 
(E16) Queen's Indian, 40 moves, 1-0

Round One, Game #5
H Ree vs Portisch, 1981
(A78) Benoni, Classical with ...Re8 and ...Na6, 42 moves, 1/2-1/2

Round One, Game #6
Smyslov vs Polugaevsky, 1981
(A30) English, Symmetrical, 20 moves, 1/2-1/2

Round Two, Game #7
Hort vs J H Donner, 1981 
(B09) Pirc, Austrian Attack, 39 moves, 1-0

Round Two, Game #8
Karpov vs Ljubojevic, 1981 
(E16) Queen's Indian, 34 moves, 1-0

Round Two, Game #9
Timman vs H Ree, 1981
(E81) King's Indian, Samisch, 35 moves, 1-0

Round Two, Game #10
Polugaevsky vs K Langeweg, 1981
(A30) English, Symmetrical, 22 moves, 1/2-1/2

Round Two, Game #11
Portisch vs Smyslov, 1981 
(D18) Queen's Gambit Declined Slav, Dutch, 41 moves, 0-1

Round Two, Game #12
Miles vs Kavalek, 1981
(A15) English, 14 moves, 1/2-1/2

Round Three, Game #13
Smyslov vs Timman, 1981
(A46) Queen's Pawn Game, 36 moves, 1/2-1/2

Round Three, Game #14
Ljubojevic vs Miles, 1981
(B17) Caro-Kann, Steinitz Variation, 15 moves, 1/2-1/2

Round Three, Game #15
J H Donner vs Karpov, 1981 
(E39) Nimzo-Indian, Classical, Pirc Variation, 53 moves, 0-1

Round Three, Game #16
H Ree vs Hort, 1981
(E15) Queen's Indian, 39 moves, 1/2-1/2

Round Three, Game #17
Kavalek vs Polugaevsky, 1981
(E12) Queen's Indian, 16 moves, 1/2-1/2

Round Three, Game #18
K Langeweg vs Portisch, 1981
(E12) Queen's Indian, 27 moves, 0-1

Round Four, Game #19
Portisch vs Kavalek, 1981 
(A22) English, 28 moves, 1-0

Round Four, Game #20
Karpov vs Miles, 1981 
(B10) Caro-Kann, 41 moves, 1-0

Round Four, Game #21
Timman vs K Langeweg, 1981
(B40) Sicilian, 31 moves, 1-0

Round Four, Game #22
Polugaevsky vs Ljubojevic, 1981
(E04) Catalan, Open, 5.Nf3, 22 moves, 1/2-1/2

Round Four, Game #23
J H Donner vs H Ree, 1981
(E60) King's Indian Defense, 44 moves, 1/2-1/2

Round Four, Game #24
Hort vs Smyslov, 1981
(D17) Queen's Gambit Declined Slav, 30 moves, 1/2-1/2

Round Five, Game #25
Kavalek vs Timman, 1981
(B08) Pirc, Classical, 15 moves, 1/2-1/2

Round Five, Game #26
K Langeweg vs Hort, 1981
(D37) Queen's Gambit Declined, 22 moves, 1/2-1/2

Round Five, Game #27
Smyslov vs J H Donner, 1981
(E03) Catalan, Open, 56 moves, 1/2-1/2

Round Five, Game #28
H Ree vs Karpov, 1981
(E15) Queen's Indian, 31 moves, 1/2-1/2

Round Five, Game #29
Miles vs Polugaevsky, 1981
(A00) Uncommon Opening, 23 moves, 1/2-1/2

Round Five, Game #30
Ljubojevic vs Portisch, 1981
(C45) Scotch Game, 20 moves, 1/2-1/2

Round Six, Game #31
Hort vs Kavalek, 1981
(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 18 moves, 1/2-1/2

Round Six, Game #32
Portisch vs Miles, 1981 
(E41) Nimzo-Indian, 33 moves, 1-0

Round Six, Game #33
Karpov vs Polugaevsky, 1981
(E17) Queen's Indian, 19 moves, 1/2-1/2

Round Six, Game #34
H Ree vs Smyslov, 1981
(A29) English, Four Knights, Kingside Fianchetto, 48 moves, 1/2-1/2

Round Six, Game #35
Timman vs Ljubojevic, 1981
(E15) Queen's Indian, 22 moves, 1/2-1/2

Round Six, Game #36
J H Donner vs K Langeweg, 1981
(E12) Queen's Indian, 43 moves, 1-0

Round Seven, Game #37
Kavalek vs J H Donner, 1981
(D54) Queen's Gambit Declined, Anti-Neo-Orthodox Variation, 36 moves, 1-0

Round Seven, Game #38
Ljubojevic vs Hort, 1981
(C42) Petrov Defense, 18 moves, 1/2-1/2

Round Seven, Game #39
Polugaevsky vs Portisch, 1981
(E04) Catalan, Open, 5.Nf3, 42 moves, 1/2-1/2

Round Seven, Game #40
Miles vs Timman, 1981
(E12) Queen's Indian, 44 moves, 1/2-1/2

Round Seven, Game #41
K Langeweg vs H Ree, 1981
(A48) King's Indian, 13 moves, 1/2-1/2

Round Seven, Game #42
Smyslov vs Karpov, 1981
(E15) Queen's Indian, 13 moves, 1/2-1/2

Round Eight, Game #43
Hort vs Miles, 1981
(E59) Nimzo-Indian, 4.e3, Main line, 30 moves, 1/2-1/2

Round Eight, Game #44
Timman vs Polugaevsky, 1981
(A07) King's Indian Attack, 59 moves, 1-0

Round Eight, Game #45
Smyslov vs K Langeweg, 1981
(B45) Sicilian, Taimanov, 38 moves, 1-0

Round Eight, Game #46
J H Donner vs Ljubojevic, 1981
(D35) Queen's Gambit Declined, 29 moves, 0-1

Round Eight, Game #47
Karpov vs Portisch, 1981
(E39) Nimzo-Indian, Classical, Pirc Variation, 48 moves, 1/2-1/2

Round Eight, Game #48
H Ree vs Kavalek, 1981
(E16) Queen's Indian, 41 moves, 1/2-1/2

Round Nine, Game #49
Kavalek vs Smyslov, 1981
(C42) Petrov Defense, 50 moves, 1/2-1/2

Round Nine, Game #50
K Langeweg vs Karpov, 1981 
(E12) Queen's Indian, 41 moves, 0-1

Round Nine, Game #51
Portisch vs Timman, 1981
(A22) English, 20 moves, 1/2-1/2

Round Nine, Game #52
Ljubojevic vs H Ree, 1981
(E90) King's Indian, 20 moves, 1/2-1/2

Round Nine, Game #53
Miles vs J H Donner, 1981
(E80) King's Indian, Samisch Variation, 64 moves, 1-0

Round Nine, Game #54
Polugaevsky vs Hort, 1981 
(D18) Queen's Gambit Declined Slav, Dutch, 22 moves, 1/2-1/2

Round Ten, Game #55
H Ree vs Miles, 1981
(A57) Benko Gambit, 32 moves, 1-0

Round Ten, Game #56
Smyslov vs Ljubojevic, 1981
(D30) Queen's Gambit Declined, 18 moves, 1/2-1/2

Round Ten, Game #57
J H Donner vs Polugaevsky, 1981
(E39) Nimzo-Indian, Classical, Pirc Variation, 26 moves, 1/2-1/2

Round Ten, Game #58
Karpov vs Timman, 1981 
(A15) English, 32 moves, 1/2-1/2

Round Ten, Game #59
K Langeweg vs Kavalek, 1981 
(E17) Queen's Indian, 20 moves, 0-1

Round Ten, Game #60
Hort vs Portisch, 1981
(C92) Ruy Lopez, Closed, 14 moves, 1/2-1/2

Round Eleven, Game #61
Portisch vs J H Donner, 1981
(E88) King's Indian, Samisch, Orthodox, 7.d5 c6, 37 moves, 1-0

Round Eleven, Game #62
Ljubojevic vs K Langeweg, 1981
(B44) Sicilian, 23 moves, 1/2-1/2

Round Eleven, Game #63
Kavalek vs Karpov, 1981
(A06) Reti Opening, 17 moves, 1/2-1/2

Round Eleven, Game #64
Polugaevsky vs H Ree, 1981 
(E11) Bogo-Indian Defense, 74 moves, 0-1

Round Eleven, Game #65
Miles vs Smyslov, 1981
(D13) Queen's Gambit Declined Slav, Exchange Variation, 12 moves, 1/2-1/2

Round Eleven, Game #66
Timman vs Hort, 1981
(D41) Queen's Gambit Declined, Semi-Tarrasch, 12 moves, 1/2-1/2

66 games

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