Costantino Aldrovandi vs Igor Borisovich Efimov
Reggio Emilia Reggio Emilia ITA round 5 1999.01.01
English Opening: Agincourt Defense 1/2-1/2

Le Quang Liem vs Igor Borisovich Efimov
Chess Olympiad Tromso NOR round 2.23 2014.08.03
Old Indian Defense: Normal Variation 1-0

Vittorio Anceschi vs Igor Borisovich Efimov
Reggio Emilia Reggio Emilia ITA round 3 1998.12.30
English Opening: Anglo-Indian Defense, Grünfeld Formation 0-1

Markus Ragger vs Igor Borisovich Efimov
Chess Olympiad Tromso NOR round 4.38 2014.08.05
Benoni Defense 1-0

Vladimir Kramnik vs Igor Borisovich Efimov
GMA Qualifier Belgorod (Russia) 1989.04.??
Sicilian Defense: Four Knights Variation, Cobra Variation 1/2-1/2

Igor Borisovich Efimov vs Sarunas Sulskis
EU-chT (Men) Pula CRO round 2 1997.05.07
Queen’s Gambit Declined: Exchange Variation 1-0

Igor Borisovich Efimov vs Zurab Alekseyevich Azmaiparashvili
URS URS 1979.??.??
Sicilian Defense: Alapin Variation 1/2-1/2

Igor Borisovich Efimov vs Hafizulhelmi Mas
34th Olympiad Istanbul TUR round 7 2000.11.04
Modern Defense 1-0

Igor Borisovich Efimov vs Alexey Shirov
Arnold Cup Gausdal NOR round 1 1991.04.21
Italian Game: Two Knights Defense, Fegatello Attack, Leonhardt Variation 0-1

Igor Borisovich Efimov vs Ljubisa Andonovski
18th Open Skopje MKD round 3 2002.01.17
Slav Defense: Bonet Gambit 1-0