round 1 K Darga vs Bobotsov, 1964 (A35) English, Symmetrical, 70 moves, 1-0 J H Donner vs A Dunkelblum, 1964  (D32) Queen's Gambit Declined, Tarrasch, 22 moves, 1-0 Filip vs Portisch, 1964  (A14) English, 29 moves, 0-1 Ivkov vs P de Rooi, 1964 (D37) Queen's Gambit Declined, 46 moves, 1-0 Keres vs C Zuidema, 1964 (C97) Ruy Lopez, Closed, Chigorin, 32 moves, 1-0 I Nei vs T van Scheltinga, 1964  (E07) Catalan, Closed, 70 moves, 1-0 Parma vs Lengyel, 1964 (C96) Ruy Lopez, Closed, 40 moves, 1-0 C van den Berg vs Larsen, 1964  (E41) Nimzo-Indian, 27 moves, 0-1 round 2 Bobotsov vs Keres, 1964 (D94) Grunfeld, 38 moves, 0-1 P de Rooi vs Filip, 1964 (B42) Sicilian, Kan, 39 moves, 0-1 Larsen vs A Dunkelblum, 1964  (A02) Bird's Opening, 35 moves, 1-0 Lengyel vs K Darga, 1964 (A15) English, 37 moves, 1/2-1/2 Portisch vs J H Donner, 1964 (E54) Nimzo-Indian, 4.e3, Gligoric System, 46 moves, 1-0 T van Scheltinga vs Ivkov, 1964 (A57) Benko Gambit, 41 moves, 1/2-1/2 C van den Berg vs Parma, 1964 (E58) Nimzo-Indian, 4.e3, Main line with 8...Bxc3, 33 moves, 0-1 C Zuidema vs I Nei, 1964  (C89) Ruy Lopez, Marshall, 29 moves, 0-1 round 3 K Darga vs C van den Berg, 1964 (E63) King's Indian, Fianchetto, Panno Variation, 56 moves, 1/2-1/2 J H Donner vs P de Rooi, 1964 (A40) Queen's Pawn Game, 53 moves, 1/2-1/2 A Dunkelblum vs Portisch, 1964 (A04) Reti Opening, 48 moves, 0-1 Filip vs T van Scheltinga, 1964 (D26) Queen's Gambit Accepted, 60 moves, 1-0 Ivkov vs C Zuidema, 1964 (E15) Queen's Indian, 32 moves, 1-0 Keres vs Lengyel, 1964 (C67) Ruy Lopez, 29 moves, 1/2-1/2 I Nei vs Bobotsov, 1964  (B90) Sicilian, Najdorf, 53 moves, 1-0 Parma vs Larsen, 1964 (B04) Alekhine's Defense, Modern, 32 moves, 1/2-1/2 round 4 Bobotsov vs Ivkov, 1964 (A16) English, 38 moves, 0-1 P de Rooi vs A Dunkelblum, 1964 (C15) French, Winawer, 23 moves, 1/2-1/2 Larsen vs Portisch, 1964 (A02) Bird's Opening, 41 moves, 1/2-1/2 Lengyel vs I Nei, 1964  (A07) King's Indian Attack, 79 moves, 1-0 Parma vs K Darga, 1964 (B04) Alekhine's Defense, Modern, 26 moves, 1/2-1/2 T van Scheltinga vs J H Donner, 1964 (E18) Queen's Indian, Old Main line, 7.Nc3, 31 moves, 1-0 C van den Berg vs Keres, 1964  (E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 49 moves, 0-1 C Zuidema vs Filip, 1964 (B42) Sicilian, Kan, 32 moves, 1-0 round 5 K Darga vs Larsen, 1964  (E60) King's Indian Defense, 42 moves, 0-1 J H Donner vs C Zuidema, 1964 (E14) Queen's Indian, 63 moves, 0-1 A Dunkelblum vs T van Scheltinga, 1964 (E11) Bogo-Indian Defense, 38 moves, 1/2-1/2 Filip vs Bobotsov, 1964 (E63) King's Indian, Fianchetto, Panno Variation, 33 moves, 1-0 Ivkov vs Lengyel, 1964  (C98) Ruy Lopez, Closed, Chigorin, 39 moves, 1-0 Keres vs Parma, 1964  (E14) Queen's Indian, 35 moves, 1/2-1/2 I Nei vs C van den Berg, 1964 (B81) Sicilian, Scheveningen, Keres Attack, 25 moves, 1-0 Portisch vs P de Rooi, 1964 (E71) King's Indian, Makagonov System (5.h3), 36 moves, 1-0 round 6 Bobotsov vs J H Donner, 1964  (D55) Queen's Gambit Declined, 43 moves, 0-1 K Darga vs Keres, 1964  (A09) Reti Opening, 25 moves, 0-1 Larsen vs P de Rooi, 1964 (E71) King's Indian, Makagonov System (5.h3), 43 moves, 1-0 Lengyel vs Filip, 1964 (D79) Neo-Grunfeld, 6.O-O, Main line, 16 moves, 1/2-1/2 Parma vs I Nei, 1964 (C84) Ruy Lopez, Closed, 25 moves, 1/2-1/2 T van Scheltinga vs Portisch, 1964 (E50) Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5, 27 moves, 0-1 C van den Berg vs Ivkov, 1964 (A57) Benko Gambit, 38 moves, 0-1 C Zuidema vs A Dunkelblum, 1964  (C16) French, Winawer, 16 moves, 1-0 round 7 P de Rooi vs T van Scheltinga, 1964 (A17) English, 34 moves, 0-1 J H Donner vs Lengyel, 1964 (E46) Nimzo-Indian, 38 moves, 1/2-1/2 A Dunkelblum vs Bobotsov, 1964 (E62) King's Indian, Fianchetto, 48 moves, 0-1 Filip vs C van den Berg, 1964 (A28) English, 28 moves, 1-0 Ivkov vs Parma, 1964 (B18) Caro-Kann, Classical, 30 moves, 1/2-1/2 Keres vs Larsen, 1964  (B32) Sicilian, 68 moves, 1/2-1/2 I Nei vs K Darga, 1964  (B28) Sicilian, O'Kelly Variation, 29 moves, 1-0 Portisch vs C Zuidema, 1964  (E11) Bogo-Indian Defense, 25 moves, 1-0 round 8 Bobotsov vs Portisch, 1964 (D35) Queen's Gambit Declined, 41 moves, 0-1 K Darga vs Ivkov, 1964 (C90) Ruy Lopez, Closed, 46 moves, 0-1 Keres vs I Nei, 1964 (D43) Queen's Gambit Declined Semi-Slav, 30 moves, 1/2-1/2 Larsen vs T van Scheltinga, 1964  (A02) Bird's Opening, 34 moves, 1-0 Lengyel vs A Dunkelblum, 1964 (A07) King's Indian Attack, 36 moves, 1-0 Parma vs Filip, 1964 (C76) Ruy Lopez, Modern Steinitz Defense, Fianchetto Variation, 31 moves, 1/2-1/2 C van den Berg vs J H Donner, 1964  (B18) Caro-Kann, Classical, 15 moves, 0-1 C Zuidema vs P de Rooi, 1964 (B32) Sicilian, 42 moves, 1-0 round 9 J H Donner vs Parma, 1964 (E58) Nimzo-Indian, 4.e3, Main line with 8...Bxc3, 57 moves, 1/2-1/2 Filip vs K Darga, 1964 (A12) English with b3, 37 moves, 1/2-1/2 Ivkov vs Keres, 1964  (C96) Ruy Lopez, Closed, 52 moves, 0-1 I Nei vs Larsen, 1964  (B32) Sicilian, 42 moves, 1-0 Portisch vs Lengyel, 1964 (E17) Queen's Indian, 26 moves, 1/2-1/2 T van Scheltinga vs C Zuidema, 1964 (E09) Catalan, Closed, 34 moves, 1/2-1/2 P de Rooi vs Bobotsov, 1964 (A16) English, 27 moves, 0-1 A Dunkelblum vs C van den Berg, 1964 (A04) Reti Opening, 30 moves, 1/2-1/2 round 10 Bobotsov vs T van Scheltinga, 1964 (A14) English, 33 moves, 1-0 K Darga vs J H Donner, 1964  (B11) Caro-Kann, Two Knights, 3...Bg4, 21 moves, 1-0 Keres vs Filip, 1964 (C93) Ruy Lopez, Closed, Smyslov Defense, 62 moves, 1-0 Larsen vs C Zuidema, 1964  (A02) Bird's Opening, 36 moves, 1-0 Lengyel vs P de Rooi, 1964 (E60) King's Indian Defense, 28 moves, 1-0 I Nei vs Ivkov, 1964 (D37) Queen's Gambit Declined, 22 moves, 1/2-1/2 Parma vs A Dunkelblum, 1964 (B10) Caro-Kann, 56 moves, 1-0 C van den Berg vs Portisch, 1964 (C93) Ruy Lopez, Closed, Smyslov Defense, 55 moves, 1/2-1/2 round 11 P de Rooi vs C van den Berg, 1964 (D01) Richter-Veresov Attack, 25 moves, 0-1 J H Donner vs Keres, 1964 (D71) Neo-Grunfeld, 31 moves, 0-1 A Dunkelblum vs K Darga, 1964 (E10) Queen's Pawn Game, 21 moves, 0-1 Filip vs I Nei, 1964 (D11) Queen's Gambit Declined Slav, 30 moves, 1/2-1/2 Ivkov vs Larsen, 1964  (B35) Sicilian, Accelerated Fianchetto, Modern Variation with Bc4, 37 moves, 0-1 Portisch vs Parma, 1964 (E11) Bogo-Indian Defense, 30 moves, 1/2-1/2 T van Scheltinga vs Lengyel, 1964 (A64) Benoni, Fianchetto, 11...Re8, 62 moves, 0-1 C Zuidema vs Bobotsov, 1964 (B93) Sicilian, Najdorf, 6.f4, 44 moves, 1/2-1/2 round 12 K Darga vs Portisch, 1964  (A14) English, 62 moves, 0-1 Ivkov vs Filip, 1964 (B17) Caro-Kann, Steinitz Variation, 31 moves, 1/2-1/2 Keres vs A Dunkelblum, 1964 (C98) Ruy Lopez, Closed, Chigorin, 39 moves, 1/2-1/2 Larsen vs Bobotsov, 1964  (A02) Bird's Opening, 46 moves, 0-1 Lengyel vs C Zuidema, 1964 (D78) Neo-Grunfeld, 6.O-O c6, 40 moves, 1-0 I Nei vs J H Donner, 1964 (A19) English, Mikenas-Carls, Sicilian Variation, 32 moves, 1-0 Parma vs P de Rooi, 1964 (B32) Sicilian, 38 moves, 1-0 C van den Berg vs T van Scheltinga, 1964 (C84) Ruy Lopez, Closed, 41 moves, 1/2-1/2 round 13 Bobotsov vs Lengyel, 1964 (A14) English, 30 moves, 1/2-1/2 P de Rooi vs K Darga, 1964 (B42) Sicilian, Kan, 60 moves, 0-1 J H Donner vs Ivkov, 1964 (A57) Benko Gambit, 30 moves, 1/2-1/2 A Dunkelblum vs I Nei, 1964  (D43) Queen's Gambit Declined Semi-Slav, 37 moves, 0-1 Filip vs Larsen, 1964 (A90) Dutch, 89 moves, 1/2-1/2 Portisch vs Keres, 1964 (E17) Queen's Indian, 28 moves, 1/2-1/2 T van Scheltinga vs Parma, 1964 (E11) Bogo-Indian Defense, 40 moves, 1/2-1/2 C Zuidema vs C van den Berg, 1964 (B82) Sicilian, Scheveningen, 95 moves, 1/2-1/2 round 14 K Darga vs T van Scheltinga, 1964 (E08) Catalan, Closed, 30 moves, 1-0 Filip vs J H Donner, 1964 (D56) Queen's Gambit Declined, 26 moves, 1/2-1/2 Ivkov vs A Dunkelblum, 1964 (D30) Queen's Gambit Declined, 41 moves, 1-0 Keres vs P de Rooi, 1964 (B35) Sicilian, Accelerated Fianchetto, Modern Variation with Bc4, 37 moves, 1-0 Larsen vs Lengyel, 1964 (A02) Bird's Opening, 30 moves, 1/2-1/2 I Nei vs Portisch, 1964  (C78) Ruy Lopez, 28 moves, 1-0 Parma vs C Zuidema, 1964 (C64) Ruy Lopez, Classical, 24 moves, 1/2-1/2 C van den Berg vs Bobotsov, 1964 (B98) Sicilian, Najdorf, 39 moves, 0-1 round 15 Bobotsov vs Parma, 1964 (A34) English, Symmetrical, 30 moves, 1/2-1/2 P de Rooi vs I Nei, 1964 (D27) Queen's Gambit Accepted, Classical, 17 moves, 1/2-1/2 J H Donner vs Larsen, 1964 (A99) Dutch, Ilyin-Genevsky Variation with b3, 49 moves, 1-0 A Dunkelblum vs Filip, 1964 (D78) Neo-Grunfeld, 6.O-O c6, 38 moves, 0-1 Lengyel vs C van den Berg, 1964  (A00) Uncommon Opening, 37 moves, 1-0 Portisch vs Ivkov, 1964 (D14) Queen's Gambit Declined Slav, Exchange Variation, 15 moves, 1/2-1/2 T van Scheltinga vs Keres, 1964 (E15) Queen's Indian, 19 moves, 1/2-1/2 C Zuidema vs K Darga, 1964 (B06) Robatsch, 29 moves, 1/2-1/2 120 games