Round 1 (April 11) Szabo vs Petrosian, 1968  (E56) Nimzo-Indian, 4.e3, Main line with 7...Nc6, 36 moves, 0-1 Round 1 (April 11) A Dueckstein vs J Teufel, 1968  (B53) Sicilian, 56 moves, 1/2-1/2 Round 1 (April 11) H Kestler vs Bobotsov, 1968 (E92) King's Indian, 41 moves, 0-1 Round 1 (April 11) Keres vs L Schmid, 1968  (B21) Sicilian, 2.f4 and 2.d4, 52 moves, 1-0 Round 1 (April 11) Ivkov vs H Pfleger, 1968 (D37) Queen's Gambit Declined, 70 moves, 1-0 Round 1 (April 11) K Klundt vs R Toran Albero, 1968 (B32) Sicilian, 37 moves, 1/2-1/2 Round 1 (April 11) Westerinen vs J H Donner, 1968 (B09) Pirc, Austrian Attack, 38 moves, 0-1 Round 1 (April 11) R Teschner vs Unzicker, 1968 (B30) Sicilian, 19 moves, 1/2-1/2 Round 2 (April 12) Szabo vs A Dueckstein, 1968 (A04) Reti Opening, 36 moves, 1-0 Round 2 (April 12) J Teufel vs H Kestler, 1968 (B32) Sicilian, 63 moves, 1/2-1/2 Round 2 (April 12) Bobotsov vs Keres, 1968  (D25) Queen's Gambit Accepted, 34 moves, 1/2-1/2 Round 2 (April 12) L Schmid vs Ivkov, 1968 (A42) Modern Defense, Averbakh System, 16 moves, 1/2-1/2 Round 2 (April 12) H Pfleger vs K Klundt, 1968 (E60) King's Indian Defense, 27 moves, 1/2-1/2 Round 2 (April 12) R Toran Albero vs Westerinen, 1968 (D91) Grunfeld, 5.Bg5, 18 moves, 1/2-1/2 Round 2 (April 12) J H Donner vs R Teschner, 1968 (D19) Queen's Gambit Declined Slav, Dutch, 33 moves, 1/2-1/2 Round 2 (April 12) Petrosian vs Unzicker, 1968 (D32) Queen's Gambit Declined, Tarrasch, 18 moves, 1/2-1/2 Round 3 (April 13) H Kestler vs Szabo, 1968 (B98) Sicilian, Najdorf, 57 moves, 1/2-1/2 Round 3 (April 13) A Dueckstein vs Petrosian, 1968  (B94) Sicilian, Najdorf, 41 moves, 0-1 Round 3 (April 13) Ivkov vs Bobotsov, 1968 (A34) English, Symmetrical, 15 moves, 1/2-1/2 Round 3 (April 13) K Klundt vs L Schmid, 1968 (B87) Sicilian, Fischer-Sozin with ...a6 and ...b5, 57 moves, 0-1 Round 3 (April 13) Westerinen vs H Pfleger, 1968 (B17) Caro-Kann, Steinitz Variation, 57 moves, 1/2-1/2 Round 3 (April 13) Keres vs J Teufel, 1968  (A54) Old Indian, Ukrainian Variation, 4.Nf3, 62 moves, 1-0 Round 3 (April 13) R Teschner vs R Toran Albero, 1968 (E99) King's Indian, Orthodox, Taimanov, 21 moves, 1/2-1/2 Round 3 (April 13) Unzicker vs J H Donner, 1968 (B09) Pirc, Austrian Attack, 21 moves, 1/2-1/2 Round 4 (April 14) Szabo vs Keres, 1968 (E45) Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation, 12 moves, 1/2-1/2 Round 4 (April 14) A Dueckstein vs H Kestler, 1968 (C44) King's Pawn Game, 44 moves, 1/2-1/2 Round 4 (April 14) J Teufel vs Ivkov, 1968 (B06) Robatsch, 41 moves, 0-1 Round 4 (April 14) Bobotsov vs K Klundt, 1968 (D94) Grunfeld, 33 moves, 1/2-1/2 Round 4 (April 14) L Schmid vs Westerinen, 1968  (A54) Old Indian, Ukrainian Variation, 4.Nf3, 17 moves, 1-0 Round 4 (April 14) H Pfleger vs R Teschner, 1968 (A30) English, Symmetrical, 25 moves, 1/2-1/2 Round 4 (April 14) R Toran Albero vs Unzicker, 1968  (E54) Nimzo-Indian, 4.e3, Gligoric System, 41 moves, 0-1 Round 4 (April 14) Petrosian vs J H Donner, 1968 (D14) Queen's Gambit Declined Slav, Exchange Variation, 14 moves, 1/2-1/2 Round 5 (April 15) Ivkov vs Szabo, 1968 (C67) Ruy Lopez, 15 moves, 1/2-1/2 Round 5 (April 15) Keres vs A Dueckstein, 1968  (C07) French, Tarrasch, 41 moves, 1-0 Round 5 (April 15) K Klundt vs J Teufel, 1968 (B53) Sicilian, 36 moves, 0-1 Round 5 (April 15) Westerinen vs Bobotsov, 1968 (B61) Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2, 41 moves, 1-0 Round 5 (April 15) R Teschner vs L Schmid, 1968 (C09) French, Tarrasch, Open Variation, Main line, 22 moves, 1/2-1/2 Round 5 (April 15) Unzicker vs H Pfleger, 1968 (A13) English, 27 moves, 1/2-1/2 Round 5 (April 15) J H Donner vs R Toran Albero, 1968 (E92) King's Indian, 41 moves, 1-0 Round 5 (April 15) H Kestler vs Petrosian, 1968 (A56) Benoni Defense, 30 moves, 1/2-1/2 Round 6 (April 17) Szabo vs K Klundt, 1968 (E70) King's Indian, 30 moves, 1-0 Round 6 (April 17) A Dueckstein vs Ivkov, 1968 (B06) Robatsch, 30 moves, 0-1 Round 6 (April 17) H Kestler vs Keres, 1968  (E15) Queen's Indian, 41 moves, 0-1 Round 6 (April 17) H Pfleger vs J H Donner, 1968 (A15) English, 40 moves, 1-0 Round 6 (April 17) L Schmid vs Unzicker, 1968 (C79) Ruy Lopez, Steinitz Defense Deferred, 43 moves, 1/2-1/2 Round 6 (April 17) Bobotsov vs R Teschner, 1968 (D42) Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3, 40 moves, 1-0 Round 6 (April 17) J Teufel vs Westerinen, 1968 (C69) Ruy Lopez, Exchange, Gligoric Variation, 14 moves, 0-1 Round 6 (April 17) Petrosian vs R Toran Albero, 1968 (E63) King's Indian, Fianchetto, Panno Variation, 41 moves, 1-0 Round 7 (April 18) Westerinen vs Szabo, 1968  (B56) Sicilian, 23 moves, 1-0 Round 7 (April 18) R Teschner vs J Teufel, 1968 (A54) Old Indian, Ukrainian Variation, 4.Nf3, 25 moves, 1-0 Round 7 (April 18) Unzicker vs Bobotsov, 1968 (B92) Sicilian, Najdorf, Opocensky Variation, 44 moves, 1-0 Round 7 (April 18) R Toran Albero vs H Pfleger, 1968 (A14) English, 46 moves, 0-1 Round 7 (April 18) J H Donner vs L Schmid, 1968 (A55) Old Indian, Main line, 24 moves, 1/2-1/2 Round 7 (April 18) K Klundt vs A Dueckstein, 1968 (C00) French Defense, 38 moves, 1/2-1/2 Round 7 (April 18) Ivkov vs H Kestler, 1968 (A37) English, Symmetrical, 24 moves, 1-0 Round 7 (April 18) Keres vs Petrosian, 1968 (C10) French, 22 moves, 1/2-1/2 Round 8 (April 19) Szabo vs R Teschner, 1968 (D17) Queen's Gambit Declined Slav, 51 moves, 0-1 Round 8 (April 19) Keres vs Ivkov, 1968  (C07) French, Tarrasch, 56 moves, 1-0 Round 8 (April 19) A Dueckstein vs Westerinen, 1968  (B02) Alekhine's Defense, 17 moves, 0-1 Round 8 (April 19) H Kestler vs K Klundt, 1968 (A16) English, 27 moves, 1-0 Round 8 (April 19) J Teufel vs Unzicker, 1968 (C69) Ruy Lopez, Exchange, Gligoric Variation, 38 moves, 1/2-1/2 Round 8 (April 19) Bobotsov vs J H Donner, 1968 (E81) King's Indian, Samisch, 35 moves, 1-0 Round 8 (April 19) L Schmid vs R Toran Albero, 1968 (B36) Sicilian, Accelerated Fianchetto, 36 moves, 1-0 Round 8 (April 19) Petrosian vs H Pfleger, 1968  (C99) Ruy Lopez, Closed, Chigorin, 12...cd, 55 moves, 1-0 Round 9 (April 20) Unzicker vs Szabo, 1968 (B64) Sicilian, Richter-Rauzer Attack, 44 moves, 1-0 Round 9 (April 20) K Klundt vs Keres, 1968 (C73) Ruy Lopez, Modern Steinitz Defense, 33 moves, 0-1 Round 9 (April 20) R Teschner vs A Dueckstein, 1968 (C17) French, Winawer, Advance, 28 moves, 1-0 Round 9 (April 20) H Pfleger vs L Schmid, 1968 (D75) Neo-Grunfeld, 6.cd Nxd5, 7.O-O c5, 8.dxc5, 42 moves, 1/2-1/2 Round 9 (April 20) J H Donner vs J Teufel, 1968 (A55) Old Indian, Main line, 31 moves, 1-0 Round 9 (April 20) Westerinen vs H Kestler, 1968 (B17) Caro-Kann, Steinitz Variation, 40 moves, 1-0 Round 9 (April 20) R Toran Albero vs Bobotsov, 1968 (E52) Nimzo-Indian, 4.e3, Main line with ...b6, 22 moves, 1/2-1/2 Round 9 (April 20) Ivkov vs Petrosian, 1968 (C84) Ruy Lopez, Closed, 41 moves, 1/2-1/2 Round 10 (April 21) Szabo vs J H Donner, 1968  (A69) Benoni, Four Pawns Attack, Main line, 24 moves, 0-1 Round 10 (April 21) A Dueckstein vs Unzicker, 1968 (C95) Ruy Lopez, Closed, Breyer, 50 moves, 1/2-1/2 Round 10 (April 21) H Kestler vs R Teschner, 1968 (D12) Queen's Gambit Declined Slav, 20 moves, 1/2-1/2 Round 10 (April 21) Keres vs Westerinen, 1968 (B09) Pirc, Austrian Attack, 55 moves, 1-0 Round 10 (April 21) Ivkov vs K Klundt, 1968 (E62) King's Indian, Fianchetto, 28 moves, 1-0 Round 10 (April 21) Petrosian vs L Schmid, 1968  (A30) English, Symmetrical, 42 moves, 1/2-1/2 Round 10 (April 21) J Teufel vs R Toran Albero, 1968 (B35) Sicilian, Accelerated Fianchetto, Modern Variation with Bc4, 55 moves, 1-0 Round 10 (April 21) Bobotsov vs H Pfleger, 1968 (D55) Queen's Gambit Declined, 57 moves, 0-1 Round 11 (April 23) R Toran Albero vs Szabo, 1968 (A15) English, 30 moves, 1/2-1/2 Round 11 (April 23) J H Donner vs A Dueckstein, 1968 (D22) Queen's Gambit Accepted, 23 moves, 1/2-1/2 Round 11 (April 23) Unzicker vs H Kestler, 1968 (B64) Sicilian, Richter-Rauzer Attack, 29 moves, 1/2-1/2 Round 11 (April 23) R Teschner vs Keres, 1968 (C71) Ruy Lopez, 18 moves, 1/2-1/2 Round 11 (April 23) Westerinen vs Ivkov, 1968 (B06) Robatsch, 73 moves, 1-0 Round 11 (April 23) H Pfleger vs J Teufel, 1968 (A46) Queen's Pawn Game, 52 moves, 1-0 Round 11 (April 23) L Schmid vs Bobotsov, 1968 (B61) Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2, 43 moves, 1-0 Round 11 (April 23) K Klundt vs Petrosian, 1968  (B87) Sicilian, Fischer-Sozin with ...a6 and ...b5, 28 moves, 1/2-1/2 Round 12 (April 24) Szabo vs H Pfleger, 1968 (D63) Queen's Gambit Declined, Orthodox Defense, 42 moves, 1/2-1/2 Round 12 (April 24) K Klundt vs Westerinen, 1968 (C75) Ruy Lopez, Modern Steinitz Defense, 48 moves, 1/2-1/2 Round 12 (April 24) A Dueckstein vs R Toran Albero, 1968 (B34) Sicilian, Accelerated Fianchetto, 38 moves, 1-0 Round 12 (April 24) H Kestler vs J H Donner, 1968 (B09) Pirc, Austrian Attack, 25 moves, 1/2-1/2 Round 12 (April 24) Ivkov vs R Teschner, 1968  (A00) Uncommon Opening, 36 moves, 0-1 Round 12 (April 24) Petrosian vs Bobotsov, 1968  (A33) English, Symmetrical, 29 moves, 1-0 Round 12 (April 24) Keres vs Unzicker, 1968 (C78) Ruy Lopez, 14 moves, 1/2-1/2 Round 12 (April 24) J Teufel vs L Schmid, 1968 (B43) Sicilian, Kan, 5.Nc3, 24 moves, 0-1 Round 13 (April 25) L Schmid vs Szabo, 1968 (B92) Sicilian, Najdorf, Opocensky Variation, 34 moves, 1/2-1/2 Round 13 (April 25) H Pfleger vs A Dueckstein, 1968 (E11) Bogo-Indian Defense, 36 moves, 1/2-1/2 Round 13 (April 25) R Toran Albero vs H Kestler, 1968 (A56) Benoni Defense, 14 moves, 1/2-1/2 Round 13 (April 25) Unzicker vs Ivkov, 1968 (C93) Ruy Lopez, Closed, Smyslov Defense, 28 moves, 1/2-1/2 Round 13 (April 25) Westerinen vs Petrosian, 1968 (B19) Caro-Kann, Classical, 13 moves, 1/2-1/2 Round 13 (April 25) J H Donner vs Keres, 1968 (E41) Nimzo-Indian, 13 moves, 1/2-1/2 Round 13 (April 25) R Teschner vs K Klundt, 1968 (D67) Queen's Gambit Declined, Orthodox Defense, Bd3 line, 55 moves, 1/2-1/2 Round 13 (April 25) Bobotsov vs J Teufel, 1968 (A54) Old Indian, Ukrainian Variation, 4.Nf3, 47 moves, 1-0 Round 14 (April 27) Szabo vs Bobotsov, 1968 (A07) King's Indian Attack, 39 moves, 0-1 Round 14 (April 27) A Dueckstein vs L Schmid, 1968 (B42) Sicilian, Kan, 53 moves, 1/2-1/2 Round 14 (April 27) H Kestler vs H Pfleger, 1968 (B09) Pirc, Austrian Attack, 26 moves, 1-0 Round 14 (April 27) Keres vs R Toran Albero, 1968  (A48) King's Indian, 38 moves, 1-0 Round 14 (April 27) Ivkov vs J H Donner, 1968 (C18) French, Winawer, 45 moves, 1-0 Round 14 (April 27) Petrosian vs J Teufel, 1968  (A15) English, 28 moves, 1/2-1/2 Round 14 (April 27) K Klundt vs Unzicker, 1968 (B53) Sicilian, 26 moves, 0-1 Round 14 (April 27) Westerinen vs R Teschner, 1968 (C79) Ruy Lopez, Steinitz Defense Deferred, 53 moves, 0-1 Round 15 (April 28) J Teufel vs Szabo, 1968 (B28) Sicilian, O'Kelly Variation, 31 moves, 1/2-1/2 Round 15 (April 28) Bobotsov vs A Dueckstein, 1968 (D07) Queen's Gambit Declined, Chigorin Defense, 41 moves, 0-1 Round 15 (April 28) L Schmid vs H Kestler, 1968 (A42) Modern Defense, Averbakh System, 41 moves, 1-0 Round 15 (April 28) J H Donner vs K Klundt, 1968 (E60) King's Indian Defense, 26 moves, 1/2-1/2 Round 15 (April 28) Unzicker vs Westerinen, 1968 (B39) Sicilian, Accelerated Fianchetto, Breyer Variation, 22 moves, 1/2-1/2 Round 15 (April 28) H Pfleger vs Keres, 1968  (A23) English, Bremen System, Keres Variation, 51 moves, 0-1 Round 15 (April 28) R Toran Albero vs Ivkov, 1968 (D14) Queen's Gambit Declined Slav, Exchange Variation, 13 moves, 1/2-1/2 Round 15 (April 28) R Teschner vs Petrosian, 1968 (C96) Ruy Lopez, Closed, 42 moves, 1/2-1/2 120 games