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Amsterdam IBM-B (1980) Amsterdam, the Netherlands, 27 June - 10 July 1980 Age Elo* 1 2 3 4 5 6 7 8 9 0 1 2 —————————————————————————————————————————————————————— 1 Ree 35 2520 • ½ ½ ½ ½ 1 1 1 ½ ½ ½ 1 7½ 2 Unzicker 55 2510 ½ • 0 ½ 1 1 1 ½ 1 ½ 1 ½ 7½ 3 Panno 45 2540 ½ 1 • ½ ½ ½ 0 ½ ½ 1 1 1 7 4 Langeweg 43 2425 ½ ½ ½ • 1 ½ ½ ½ ½ 1 ½ ½ 6½ =5 Ligterink 30 2455 ½ 0 ½ 0 • 1 ½ ½ 1 ½ 0 1 5½ =5 Böhm 30 2430 0 0 ½ ½ 0 • 0 1 ½ 1 1 1 5½ =7 Borm 30 2355 0 0 1 ½ ½ 1 • ½ 1 0 0 ½ 5 =7 Rogoff 27 2520 0 ½ ½ ½ ½ 0 ½ • ½ ½ 1 ½ 5 =7 Van Wijgerden 30 2435 ½ 0 ½ ½ 0 ½ 0 ½ • 1 1 ½ 5 =10 Sznapik 29 2460 ½ ½ 0 0 ½ 0 1 ½ 0 • ½ ½ 4 =10 Smejkal 34 2555 ½ 0 0 ½ 1 0 1 0 0 ½ • ½ 4 12 Hofland 26 2300 0 ½ 0 ½ 0 0 ½ ½ ½ ½ ½ • 3½ —————————————————————————————————————————————————————— Eleven rounds in 14 days, starting on Friday 27 June. Rest days 1, 6 & 9 July. Ree won on tiebreak ahead of Unzicker, both with 7.5/11. Sources Dutchbase I (https://maxeuwe.nl/files-dutchbase/...) Dutchbase II (https://maxeuwe.nl/files-dutchbase/...) *FIDE rating list January 1980 (https://web.archive.org/web/2023041...) El Ajedrez, September 1980, pp. 404-407 (http://www.historiadelajedrezespano...) Jaque 105, September 1980, pp. 9-16 (https://www.olimpbase.org/leagueES/...) Dutch newspapers (available at https://www.delpher.nl/nl/kranten) Previous: Amsterdam IBM-B (1979). See also Amsterdam IBM (1980) and Amsterdam IBM-C (1980)  page 1 of 2; games 1-25 of 35  Game   Result Moves Year Event/Locale Opening 1. L Hofland vs Unzicker   ½-½ 18 1980 Amsterdam IBM-B A13 English 2. K Rogoff vs G Ligterink   ½-½ 33 1980 Amsterdam IBM-B D32 Queen's Gambit Declined, Tarrasch 3. Panno vs K Langeweg   ½-½ 40 1980 Amsterdam IBM-B A33 English, Symmetrical 4. C van Wijgerden vs L Hofland   ½-½ 12 1980 Amsterdam IBM-B B13 Caro-Kann, Exchange 5. H Ree vs Unzicker   ½-½ 32 1980 Amsterdam IBM-B E12 Queen's Indian 6. G Ligterink vs Panno   ½-½ 25 1980 Amsterdam IBM-B B82 Sicilian, Scheveningen 7. L Hofland vs K Langeweg   ½-½ 22 1980 Amsterdam IBM-B A04 Reti Opening 8. A Sznapik vs G Ligterink   ½-½ 24 1980 Amsterdam IBM-B B33 Sicilian 9. Panno vs H Bohm   ½-½ 17 1980 Amsterdam IBM-B A34 English, Symmetrical 10. Smejkal vs H Ree   ½-½ 20 1980 Amsterdam IBM-B D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack 11. K Rogoff vs F Borm   ½-½ 34 1980 Amsterdam IBM-B A30 English, Symmetrical 12. H Ree vs C van Wijgerden   ½-½ 16 1980 Amsterdam IBM-B E06 Catalan, Closed, 5.Nf3 13. K Langeweg vs Unzicker   ½-½ 17 1980 Amsterdam IBM-B E18 Queen's Indian, Old Main line, 7.Nc3 14. C van Wijgerden vs K Langeweg   ½-½ 34 1980 Amsterdam IBM-B B22 Sicilian, Alapin 15. H Ree vs K Langeweg   ½-½ 56 1980 Amsterdam IBM-B B40 Sicilian 16. K Rogoff vs Panno   ½-½ 26 1980 Amsterdam IBM-B A29 English, Four Knights, Kingside Fianchetto 17. Smejkal vs A Sznapik   ½-½ 74 1980 Amsterdam IBM-B E63 King's Indian, Fianchetto, Panno Variation 18. F Borm vs L Hofland   ½-½ 22 1980 Amsterdam IBM-B B46 Sicilian, Taimanov Variation 19. A Sznapik vs K Rogoff   ½-½ 16 1980 Amsterdam IBM-B C42 Petrov Defense 20. L Hofland vs Smejkal   ½-½ 45 1980 Amsterdam IBM-B A21 English 21. Panno vs H Ree   ½-½ 13 1980 Amsterdam IBM-B A37 English, Symmetrical 22. C van Wijgerden vs H Bohm   ½-½ 19 1980 Amsterdam IBM-B D10 Queen's Gambit Declined Slav 23. H Ree vs G Ligterink   ½-½ 32 1980 Amsterdam IBM-B A81 Dutch 24. H Bohm vs K Langeweg   ½-½ 57 1980 Amsterdam IBM-B A02 Bird's Opening 25. K Rogoff vs L Hofland   ½-½ 22 1980 Amsterdam IBM-B B07 Pirc  page 1 of 2; games 1-25 of 35    REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2)   Nov-22-22    Ninas Husband: Ken Rogoff's last tournament. 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