Lajos Portisch vs Petar Popovic
6th Vidmar Memorial Portoroz / Ljubljana YUG round 3 1985.06.??
Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation 1-0

Lajos Portisch vs Raymond Keene
EUR-chT (Men) 6th Moscow URS round 3 1977.04.??
Colle System: Rhamphorhynchus Variation 1-0

Lajos Portisch vs Vladimir Mikhailovich Liberzon
Biel Interzonal Biel SUI round 1 1976.07.11
King’s Indian Defense: Orthodox Variation, Positional Defense, Main Line 1/2-1/2

Lars Karlsson vs Lajos Portisch
6th Vidmar Memorial Portoroz / Ljubljana YUG round 5 1985.06.??
Colle System: Rhamphorhynchus Variation 1/2-1/2

Mikhail Tal vs Lajos Portisch
Niksic Niksic YUG round 15 1983.09.12
Sicilian Defense: Najdorf Variation, Main Line 1/2-1/2

Boris Spassky vs Lajos Portisch
Budapest-Leningrad Budapest HUN round 4 1961.04.??
Caro-Kann Defense: Classical Variation 1-0

Lajos Portisch vs Pal Benko
HUN-ch 11th Budapest HUN 1955.12.??
King’s Indian Defense: Sämisch Variation, Bronstein Defense 0-1

Mihai Suba vs Lajos Portisch
Thessaloniki Olympiad Thessaloniki GRE round 12 1984.12.01
English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation 0-1

Ulf Andersson vs Lajos Portisch
Biel SKA Biel SUI round 9 1996.08.01
Queen’s Gambit Declined: Anti-Tartakower Variation 1/2-1/2

Kick Langeweg vs Lajos Portisch
Amsterdam IBM Amsterdam NED round 8 1963.09.05
Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation 0-1