round 1 J H Donner vs Gruenfeld, 1961 (E30) Nimzo-Indian, Leningrad, 33 moves, 0-1 F Olafsson vs Larsen, 1961  (A04) Reti Opening, 97 moves, 0-1 E Gereben vs Ivkov, 1961 (A04) Reti Opening, 61 moves, 0-1 Uhlmann vs J T Barendregt, 1961  (A42) Modern Defense, Averbakh System, 21 moves, 1-0 T D van Scheltinga vs C van den Berg, 1961 (A15) English, 26 moves, 1/2-1/2 round 2 J T Barendregt vs J H Donner, 1961 (C69) Ruy Lopez, Exchange, Gligoric Variation, 56 moves, 0-1 Gruenfeld vs T D van Scheltinga, 1961 (E60) King's Indian Defense, 36 moves, 1/2-1/2 Larsen vs Ivkov, 1961 (A34) English, Symmetrical, 40 moves, 1-0 F Olafsson vs Uhlmann, 1961  (D83) Grunfeld, Grunfeld Gambit, 17 moves, 1/2-1/2 C van den Berg vs E Gereben, 1961 (B15) Caro-Kann, 41 moves, 1-0 round 3 J H Donner vs F Olafsson, 1961 (E94) King's Indian, Orthodox, 42 moves, 0-1 E Gereben vs Gruenfeld, 1961  (C95) Ruy Lopez, Closed, Breyer, 41 moves, 1/2-1/2 Ivkov vs C van den Berg, 1961  (E19) Queen's Indian, Old Main line, 9.Qxc3, 37 moves, 1-0 Uhlmann vs Larsen, 1961  (A62) Benoni, Fianchetto Variation, 40 moves, 0-1 T D van Scheltinga vs J T Barendregt, 1961 (C41) Philidor Defense, 31 moves, 1/2-1/2 round 4 J T Barendregt vs E Gereben, 1961 (B29) Sicilian, Nimzovich-Rubinstein, 31 moves, 1/2-1/2 Gruenfeld vs Ivkov, 1961 (E67) King's Indian, Fianchetto, 35 moves, 0-1 Larsen vs C van den Berg, 1961 (A29) English, Four Knights, Kingside Fianchetto, 58 moves, 1/2-1/2 F Olafsson vs T D van Scheltinga, 1961 (D45) Queen's Gambit Declined Semi-Slav, 34 moves, 1/2-1/2 Uhlmann vs J H Donner, 1961 (E62) King's Indian, Fianchetto, 44 moves, 1/2-1/2 round 5 J H Donner vs Larsen, 1961 (A56) Benoni Defense, 40 moves, 0-1 E Gereben vs F Olafsson, 1961  (E70) King's Indian, 43 moves, 1-0 Ivkov vs J T Barendregt, 1961 (A41) Queen's Pawn Game (with ...d6), 43 moves, 1-0 T D van Scheltinga vs Uhlmann, 1961 (E62) King's Indian, Fianchetto, 39 moves, 0-1 C van den Berg vs Gruenfeld, 1961 (C94) Ruy Lopez, Closed, Breyer Defense, 34 moves, 1/2-1/2 round 6 J T Barendregt vs C van den Berg, 1961 (B40) Sicilian, 39 moves, 1/2-1/2 J H Donner vs T D van Scheltinga, 1961 (B42) Sicilian, Kan, 42 moves, 1/2-1/2 Larsen vs Gruenfeld, 1961  (A00) Uncommon Opening, 55 moves, 1-0 F Olafsson vs Ivkov, 1961 (C16) French, Winawer, 53 moves, 1/2-1/2 Uhlmann vs E Gereben, 1961 (A54) Old Indian, Ukrainian Variation, 4.Nf3, 38 moves, 1-0 round 7 E Gereben vs J H Donner, 1961 (A48) King's Indian, 42 moves, 1-0 Gruenfeld vs J T Barendregt, 1961 (A41) Queen's Pawn Game (with ...d6), 22 moves, 1/2-1/2 Ivkov vs Uhlmann, 1961 (E97) King's Indian, 65 moves, 1-0 T D van Scheltinga vs Larsen, 1961 (A52) Budapest Gambit, 60 moves, 1-0 C van den Berg vs F Olafsson, 1961 (B97) Sicilian, Najdorf, 40 moves, 1/2-1/2 round 8 J H Donner vs Ivkov, 1961 (E60) King's Indian Defense, 39 moves, 0-1 Larsen vs J T Barendregt, 1961 (A02) Bird's Opening, 33 moves, 1-0 F Olafsson vs Gruenfeld, 1961 (D42) Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3, 47 moves, 1-0 Uhlmann vs C van den Berg, 1961 (E00) Queen's Pawn Game, 24 moves, 1/2-1/2 T D van Scheltinga vs E Gereben, 1961 (E60) King's Indian Defense, 40 moves, 0-1 round 9 J T Barendregt vs F Olafsson, 1961 (B52) Sicilian, Canal-Sokolsky (Rossolimo) Attack, 55 moves, 0-1 E Gereben vs Larsen, 1961 (A43) Old Benoni, 36 moves, 0-1 Gruenfeld vs Uhlmann, 1961  (E72) King's Indian, 21 moves, 0-1 Ivkov vs T D van Scheltinga, 1961  (D43) Queen's Gambit Declined Semi-Slav, 56 moves, 1-0 C van den Berg vs J H Donner, 1961 (C75) Ruy Lopez, Modern Steinitz Defense, 16 moves, 1/2-1/2 45 games