Round One C H Alexander vs Gligoric, 1956 (C47) Four Knights, 40 moves, 1/2-1/2 O'Kelly vs P H Clarke, 1956 (A24) English, Bremen System with ...g6, 36 moves, 1-0 F Olafsson vs J Penrose, 1956  (E50) Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5, 27 moves, 1-0 Szabo vs D Horseman, 1956 (E43) Nimzo-Indian, Fischer Variation, 48 moves, 1/2-1/2 R Toran vs Larsen, 1956  (A89) Dutch, Leningrad, Main Variation with Nc6, 55 moves, 0-1 Round Two P H Clarke vs R Toran, 1956  (B93) Sicilian, Najdorf, 6.f4, 22 moves, 1-0 D Horseman vs Gligoric, 1956 (C29) Vienna Gambit, 40 moves, 0-1 Larsen vs F Olafsson, 1956 (A30) English, Symmetrical, 41 moves, 0-1 J Penrose vs C H Alexander, 1956 (C42) Petrov Defense, 26 moves, 1/2-1/2 Szabo vs O'Kelly, 1956 (A30) English, Symmetrical, 25 moves, 1/2-1/2 Round Three C H Alexander vs Larsen, 1956  (B96) Sicilian, Najdorf, 40 moves, 0-1 Gligoric vs J Penrose, 1956 (D11) Queen's Gambit Declined Slav, 41 moves, 1-0 O'Kelly vs D Horseman, 1956 (E43) Nimzo-Indian, Fischer Variation, 29 moves, 1-0 F Olafsson vs P H Clarke, 1956 (D41) Queen's Gambit Declined, Semi-Tarrasch, 43 moves, 1/2-1/2 R Toran vs Szabo, 1956 (B13) Caro-Kann, Exchange, 20 moves, 1/2-1/2 Round Four P H Clarke vs C H Alexander, 1956 (E69) King's Indian, Fianchetto, Classical Main line, 30 moves, 1/2-1/2 D Horseman vs J Penrose, 1956  (A26) English, 57 moves, 1-0 Larsen vs Gligoric, 1956 (E66) King's Indian, Fianchetto, Yugoslav Panno, 22 moves, 1/2-1/2 O'Kelly vs R Toran, 1956 (C99) Ruy Lopez, Closed, Chigorin, 12...cd, 42 moves, 1-0 Szabo vs F Olafsson, 1956 (C86) Ruy Lopez, Worrall Attack, 23 moves, 1/2-1/2 Round Five C H Alexander vs Szabo, 1957 (B16) Caro-Kann, Bronstein-Larsen Variation, 54 moves, 0-1 Gligoric vs P H Clarke, 1957 (E59) Nimzo-Indian, 4.e3, Main line, 41 moves, 1/2-1/2 F Olafsson vs O'Kelly, 1957 (A15) English, 47 moves, 1/2-1/2 J Penrose vs Larsen, 1957  (B10) Caro-Kann, 21 moves, 0-1 R Toran vs D Horseman, 1957  (A21) English, 59 moves, 1-0 Round Six P H Clarke vs J Penrose, 1957 (A29) English, Four Knights, Kingside Fianchetto, 33 moves, 1/2-1/2 D Horseman vs Larsen, 1957  (A68) Benoni, Four Pawns Attack, 37 moves, 0-1 O'Kelly vs C H Alexander, 1957 (A26) English, 41 moves, 1-0 Szabo vs Gligoric, 1957 (C97) Ruy Lopez, Closed, Chigorin, 34 moves, 1/2-1/2 R Toran vs F Olafsson, 1957 (A16) English, 26 moves, 1/2-1/2 Round Seven C H Alexander vs R Toran, 1957 (B32) Sicilian, 28 moves, 1/2-1/2 Gligoric vs O'Kelly, 1957 (C98) Ruy Lopez, Closed, Chigorin, 41 moves, 1-0 Larsen vs P H Clarke, 1957  (E66) King's Indian, Fianchetto, Yugoslav Panno, 64 moves, 1/2-1/2 F Olafsson vs D Horseman, 1957  (E21) Nimzo-Indian, Three Knights, 39 moves, 1-0 J Penrose vs Szabo, 1957 (C44) King's Pawn Game, 32 moves, 1/2-1/2 Round Eight D Horseman vs P H Clarke, 1957 (B18) Caro-Kann, Classical, 42 moves, 1/2-1/2 O'Kelly vs J Penrose, 1957 (E59) Nimzo-Indian, 4.e3, Main line, 88 moves, 1/2-1/2 F Olafsson vs C H Alexander, 1957  (A28) English, 32 moves, 1-0 Szabo vs Larsen, 1957  (B53) Sicilian, 37 moves, 0-1 R Toran vs Gligoric, 1957 (C76) Ruy Lopez, Modern Steinitz Defense, Fianchetto Variation, 20 moves, 1/2-1/2 Round Nine C H Alexander vs D Horseman, 1957  (C02) French, Advance, 38 moves, 0-1 P H Clarke vs Szabo, 1957 (C71) Ruy Lopez, 25 moves, 1/2-1/2 Gligoric vs F Olafsson, 1957  (C43) Petrov, Modern Attack, 42 moves, 1-0 Larsen vs O'Kelly, 1957 (E19) Queen's Indian, Old Main line, 9.Qxc3, 51 moves, 1/2-1/2 J Penrose vs R Toran, 1957  (B39) Sicilian, Accelerated Fianchetto, Breyer Variation, 21 moves, 1/2-1/2 45 games