| Apr 30, 2026 | Bertagnolli | ½–½ | Efimov | Finals: Bertagnolli, Alexander - Efimov, Igor | Pirc Defense | |
| Apr 29, 2026 | Carlo | ½–½ | Efimov | Semifinals: Carlo, Emanuele - Efimov, Igor | Modern Defense | |
| Apr 28, 2026 | Ceres | 1–0 | Efimov | Round 7: Ceres, Dragos - Efimov, Igor | Scandinavian Defense: Valencian Variation | |
| Apr 27, 2026 | Marzocchi | ½–½ | Efimov | Round 6: Marzocchi, Tommaso - Efimov, Igor | French Defense: Winawer Variation, Advance Variation | |
| Apr 27, 2026 | Efimov | ½–½ | Stella | Round 5: Efimov, Igor - Stella, Andrea | Queen's Gambit Declined: Three Knights Variation | |
| Apr 26, 2026 | Efimov | 1–0 | Bertagnolli | Round 4: Efimov, Igor - Bertagnolli, Alexander | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Apr 25, 2026 | Yao | ½–½ | Efimov | Round 3: Yao, Stefano - Efimov, Igor | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Apr 25, 2026 | Efimov | ½–½ | De Filomeno | Round 2: Efimov, Igor - De Filomeno, Simone | Sicilian Defense: Alapin Variation | |
| Apr 24, 2026 | Lumachi | 1–0 | Efimov | Round 1: Lumachi, Gabriele - Efimov, Igor | French Defense: Paulsen Variation | |
| Feb 22, 2026 | Senthil | ½–½ | Efimov | iii Festival della Dragonara | Horwitz Defense | |
| Feb 22, 2026 | Efimov | 1–0 | De Martino | iii Festival della Dragonara | Semi-Slav Defense: Main Line | |
| Feb 21, 2026 | Vuelban | ½–½ | Efimov | iii Festival della Dragonara | Pirc Defense | |
| Feb 21, 2026 | Efimov | 1–0 | Margaryan | iii Festival della Dragonara | Grünfeld Defense: Opocensky Variation | |
| Feb 20, 2026 | Simonelli | 0–1 | Efimov | iii Festival della Dragonara | Queen's Pawn Game | |
| Nov 22, 2025 | Efimov | 0–1 | Isaakidis | Round 9: Efimov, Igor - Isaakidis, Alexandros | Caro-Kann Defense: Classical Variation | |
| Nov 19, 2025 | Efimov | 1–0 | Mooney | Round 7: Efimov, Igor - Mooney, Graham | Modern Defense: Standard Defense | |
| Nov 19, 2025 | De La Riva Aguado | ½–½ | Efimov | Round 6: De La Riva Aguado, Oscar - Efimov, Igor | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Nov 18, 2025 | Efimov | ½–½ | Wiedenkeller | Round 5: Efimov, Igor - Wiedenkeller, Michael | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Nov 17, 2025 | Novak | ½–½ | Efimov | Round 3: Novak, Attila Robert - Efimov, Igor | Queen's Pawn Game | |
| Nov 16, 2025 | Efimov | 1–0 | Holland | Round 2: Efimov, Igor - Holland, Christopher | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Nov 14, 2025 | Krieger | 1–0 | Efimov | Round 4: Krieger, Markus - Efimov, Igor | French Defense: Exchange Variation | |
| Nov 2, 2025 | Gurel | 1–0 | Efimov | FIDE World Cup 2025 | Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation | |
| Oct 31, 2025 | Efimov | 0–1 | Gurel | FIDE World Cup 2025 | Zukertort Opening | |
| Apr 26, 2025 | Efimov | 0–1 | Altini | Round 3: Efimov, Igor - Altini, Nicola | Queen's Pawn Game: Symmetrical Variation | |
| Apr 25, 2025 | Efimov | 0–1 | Santeramo | Round 1: Efimov, Igor - Santeramo, Domenico | Dutch Defense: Classical Variation | |
| Feb 21, 2025 | Tondi | 0–1 | Efimov | new tournament description | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Nov 16, 2024 | Treccozzi | ½–½ | Efimov | XVII Festival Città di Recco | Queen's Pawn Game | |
| Nov 16, 2024 | Di Liberto | 0–1 | Efimov | XVII Festival Città di Recco | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Sep 22, 2024 | Efimov | 1–0 | Krieger | 45th FIDE Chess Olympiad | King's Indian Attack: Double Fianchetto | |
| Sep 21, 2024 | Rodriguez Vila | ½–½ | Efimov | 45th FIDE Chess Olympiad | Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation | |
| Sep 19, 2024 | Efimov | ½–½ | Burovic | 45th FIDE Chess Olympiad | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Sep 18, 2024 | Mafaaz Khalid | 0–1 | Efimov | 45th FIDE Chess Olympiad | Czech Defense | |
| Sep 16, 2024 | Hernandez Guerrero | 0–1 | Efimov | 45th FIDE Chess Olympiad | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Sep 15, 2024 | Haidary | 0–1 | Efimov | 45th FIDE Chess Olympiad | French Defense: Exchange Variation | |
| Sep 14, 2024 | Efimov | 0–1 | Quizon | 45th FIDE Chess Olympiad | Indian Defense: Przepiorka Variation | |
| Sep 12, 2024 | Efimov | 0–1 | Suleymenov | 45th FIDE Chess Olympiad | Indian Defense: Przepiorka Variation | |
| Sep 11, 2024 | Mchangama Omar | 0–1 | Efimov | 45th FIDE Chess Olympiad | Sicilian Defense: Bowdler Attack | |
| Jun 29, 2024 | Efimov | 1–0 | Apol | 5th European Small Nations Individual | King's Indian Defense: Smyslov Variation | |
| Jun 28, 2024 | Carpenter | 0–1 | Efimov | 5th European Small Nations Individual | Nimzo-Larsen Attack: Modern Variation | |
| Jun 27, 2024 | Efimov | 1–0 | D`Amico | 5th European Small Nations Individual | English Opening: King's English Variation, Four Knights Variation, Flexible Line | |
| Jun 26, 2024 | Efimov | 1–0 | Frick | Round 5: Efimov, Igor - Frick, Renato | Torre Attack: Classical Defense | |
| Jun 26, 2024 | Ribera Veganzones | 0–1 | Efimov | 5th European Small Nations Individual | Modern Defense | |
| Jun 25, 2024 | Pace | 0–1 | Efimov | 5th European Small Nations Individual | Caro-Kann Defense: Gurgenidze System | |
| Jun 24, 2024 | Efimov | ½–½ | Michaelides | Round 3: Efimov, Igor - Michaelides, Konstantinos | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jun 23, 2024 | Berend | ½–½ | Efimov | Round 1: Berend, Fred - Efimov, Igor | Sicilian Defense: French Variation | |
| Jun 18, 2024 | Strade | 0–1 | Efimov | Round 2: Strade, Arita - Efimov, Igor | French Defense: Advance Variation | |
| Jun 26, 2021 | Kozul | 1–0 | Efimov | 11th Mediterranean Championship | Queen's Pawn Game: Modern Defense | |
| Jun 25, 2021 | Efimov | ½–½ | Saric | 11th Mediterranean Championship | Queen's Gambit Declined: Traditional Variation | |
| Jun 24, 2021 | Ozenir | ½–½ | Efimov | 11th Mediterranean Championship | Pirc Defense | |
| Jun 22, 2021 | Efimov | 1–0 | Uruci | 11th Mediterranean Championship | Queen's Pawn Game: Accelerated London System | |
| Jun 21, 2021 | Lipovcic | * | Efimov | 11th Mediterranean Championship | ? | |
| Jun 20, 2021 | Efimov | * | Miletic | 11th Mediterranean Championship | ? | |
| Jun 19, 2021 | Elier | * | Efimov | 11th Mediterranean Championship | ? | |
| — | Efimov | 1–0 | Rolle | XVII Festival Città di Recco | Trompowsky Attack | |
| — | Efimov | ½–½ | Piscopo | XVII Festival Città di Recco | Slav Defense: Exchange Variation, Symmetrical Line | |
| — | Efimov | 0–1 | Gioseffi | new tournament description | Queen's Indian Defense: Kasparov Variation | |
| — | Efimov | ½–½ | Fulgentini | new tournament description | Nimzo-Indian Defense: Reshevsky Variation | |
| — | Vairo | 0–1 | Efimov | XVII Festival Città di Recco | French Defense: Advance Variation, Extended Bishop Swap | |
| — | Scarsella | 0–1 | Efimov | new tournament description | Trompowsky Attack | |
| — | Serban | 0–1 | Efimov | new tournament description | King's Indian Attack: Spassky Variation | |