Semen Isaakovich Dvoirys vs Alexey Dreev
URS-ch FL56 Simferopol (Ukraine) round 12 1988.11.??
French Defense: Guimard Variation, Thunderbunny Variation 1/2-1/2

Semen Isaakovich Dvoirys vs Alexander Morozevich
Cup Russia Final Samara RUS round 3 1998.08.31
French Defense: Guimard Variation, Thunderbunny Variation 1/2-1/2

Semen Isaakovich Dvoirys vs Ilya Khmelniker
Beer Shiva Rapid Israel round 1 2004.04.18
Ruy Lopez: Open 1-0

Semen Isaakovich Dvoirys vs Alexander Grischuk
56th Russian Championship Krasnoyarsk RUS round 1 2003.09.03
Caro-Kann Defense: Two Knights Attack, Mindeno Variation 1/2-1/2

Laszlo Hazai vs Semen Isaakovich Dvoirys
Chigorin Memorial Sochi URS round 6 1982.12.??
Sicilian Defense: Scheveningen Variation, Keres Attack 0-1

Zigurds Fridrikhovich Lanka vs Semen Isaakovich Dvoirys
URS-chT Naberezhnye Chelny URS 1988.10.??
Sicilian Defense: Four Knights Variation, Cobra Variation 1-0

Rafael Vaganian vs Semen Isaakovich Dvoirys
URS-ch56 Odessa URS round 1 1989.09.??
English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation 1-0

Konstantin Nikolayevich Aseev vs Semen Isaakovich Dvoirys
URS-ch56 Odessa URS round 14 1989.10.??
Ruy Lopez: Marshall Attack 1-0

Alexey Dreev vs Semen Isaakovich Dvoirys
St. Petersburg Zonal St. Petersburg RUS 1993.01.??
Grünfeld Defense: Exchange Variation, Classical Variation 1/2-1/2

Semen Isaakovich Dvoirys vs Giorgi Giorgadze
URS-ch56 Odessa URS round 11 1989.10.??
Ruy Lopez: Closed, Breyer 0-1