Game #4 Benko vs Portisch, 1956 (C04) French, Tarrasch, Guimard Main line, 32 moves, 0-1 Game #7 K Honfi vs Portisch, 1957 (B00) Uncommon King's Pawn Opening, 32 moves, 0-1 Game #8 Tolush vs Portisch, 1958  (E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 67 moves, 0-1 Game #9 Portisch vs Szabo, 1958  (D85) Grunfeld, 28 moves, 1-0 Game #11 J Durao vs Portisch, 1960 (B41) Sicilian, Kan, 34 moves, 0-1 Game #12 Yanofsky vs Portisch, 1962  (B43) Sicilian, Kan, 5.Nc3, 62 moves, 0-1 Game #13 Portisch vs B Larsen, 1963 (E46) Nimzo-Indian, 31 moves, 1-0 Game #14 T van Scheltinga vs Portisch, 1964 (E50) Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5, 27 moves, 0-1 Game #15 Portisch vs Gligoric, 1964 (E69) King's Indian, Fianchetto, Classical Main line, 38 moves, 1-0 Game #16 Reshevsky vs Portisch, 1964  (B43) Sicilian, Kan, 5.Nc3, 37 moves, 0-1 Game #17 Portisch vs Lengyel, 1965 (E47) Nimzo-Indian, 4.e3 O-O 5.Bd3, 30 moves, 1-0 Game #19 Portisch vs J H Donner, 1966  (A33) English, Symmetrical, 19 moves, 1-0 Game #20 Portisch vs Petrosian, 1966  (E63) King's Indian, Fianchetto, Panno Variation, 32 moves, 1-0 Game #21 Keres vs Portisch, 1967  (C93) Ruy Lopez, Closed, Smyslov Defense, 90 moves, 0-1 Game #22 Portisch vs B Larsen, 1967  (A41) Queen's Pawn Game (with ...d6), 43 moves, 1-0 Game #23 Portisch vs Stein, 1967  (E69) King's Indian, Fianchetto, Classical Main line, 58 moves, 1-0 Game #24 Portisch vs Uhlmann, 1968  (C18) French, Winawer, 48 moves, 1-0 Game #25 Portisch vs B Larsen, 1968 (E54) Nimzo-Indian, 4.e3, Gligoric System, 57 moves, 1-0 Game #26 Portisch vs J Dueball, 1969 (A56) Benoni Defense, 42 moves, 1-0 Game #27 Portisch vs Bronstein, 1969  (D06) Queen's Gambit Declined, 20 moves, 1-0 Game #28 Portisch vs Fischer, 1970  (E45) Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation, 39 moves, 1/2-1/2 Game #29 Portisch vs Gligoric, 1970 (A33) English, Symmetrical, 41 moves, 1-0 Game #30 Portisch vs Sax, 1971  (E60) King's Indian Defense, 27 moves, 1-0 Game #31 Ljubojevic vs Portisch, 1972 (B87) Sicilian, Fischer-Sozin with ...a6 and ...b5, 40 moves, 0-1 Game #33 Portisch vs A Saidy, 1972  (D10) Queen's Gambit Declined Slav, 43 moves, 1-0 Game #33 Portisch vs Keres, 1973  (A17) English, 39 moves, 1-0 Game #34 Ljubojevic vs Portisch, 1973  (C00) French Defense, 40 moves, 1/2-1/2 Game #35 Polugaevsky vs Portisch, 1973 (D63) Queen's Gambit Declined, Orthodox Defense, 54 moves, 0-1 Game #36 Portisch vs Szabo, 1974  (A21) English, 36 moves, 1-0 Game #37 Portisch vs Petrosian, 1974  (D10) Queen's Gambit Declined Slav, 66 moves, 1-0 Game #38 Portisch vs I Radulov, 1974  (D26) Queen's Gambit Accepted, 24 moves, 1-0 Game #39 Hort vs Portisch, 1974  (E04) Catalan, Open, 5.Nf3, 53 moves, 1/2-1/2 Game #40 J Barle vs Portisch, 1975  (C25) Vienna, 27 moves, 0-1 Game #41 Browne vs Portisch, 1975 (C72) Ruy Lopez, Modern Steinitz Defense, 5.O-O, 41 moves, 0-1 Game #42 Portisch vs Karpov, 1975  (E53) Nimzo-Indian, 4.e3, 41 moves, 1/2-1/2 35 games