| Dec 20, 2025 | Yalcinkaya | 1–0 | Atar | Round 9: Yalcinkaya, Efe - Atar, Efecan | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Dec 20, 2025 | Atar | 0–1 | Yildiz | Round 8: Atar, Efecan - Yildiz, Serdar Murat | Queen's Indian Defense: Classical Variation, Traditional Variation | |
| Dec 20, 2025 | Atar | 1–0 | Karabulut | Round 7: Atar, Efecan - Karabulut, Etka | English Opening | |
| Dec 20, 2025 | Ersoz | ½–½ | Atar | Round 6: Ersoz, Teoman Guney - Atar, Efecan | French Defense: Rubinstein Variation, Blackburne Defense | |
| Dec 19, 2025 | Atar | 1–0 | Kimsanov | Round 5: Atar, Efecan - Kimsanov, Akhrorbek | English Opening: Symmetrical Variation, Three Knights Variation | |
| Dec 19, 2025 | Borischik | 1–0 | Atar | Round 4: Borischik, Sergey - Atar, Efecan | King's Indian Attack: Sicilian Variation | |
| Dec 19, 2025 | Atar | 0–1 | Camlar | Round 3: Atar, Efecan - Camlar, Arda | King's Indian Defense: Fianchetto Variation, Classical Fianchetto | |
| Dec 19, 2025 | Abdukhakimov | 1–0 | Atar | Round 2: Abdukhakimov, Akbarali - Atar, Efecan | Queen's Gambit Accepted | |
| Dec 19, 2025 | Atar | 1–0 | Mark Smirnov | Round 1: Atar, Efecan - Mark Smirnov | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Dec 18, 2025 | Taran | 0–1 | Atar | Round 9: Taran, Robert - Atar, Efecan | French Defense: Rubinstein Variation | |
| Dec 18, 2025 | Atar | 1–0 | Taran | Round 8: Atar, Efecan - Taran, German Ed | English Opening: Anglo-Dutch Defense | |
| Dec 18, 2025 | Shamsuddin | 1–0 | Atar | Round 7: Shamsuddin, Sayyid Usmon - Atar, Efecan | Van Geet Opening: Novosibirsk Variation | |
| Dec 17, 2025 | Akkaya | 1–0 | Atar | Round 6: Akkaya, Atakan - Atar, Efecan | French Defense: Rubinstein Variation, Blackburne Defense | |
| Dec 17, 2025 | Atar | 0–1 | Borischik | Round 5: Atar, Efecan - Borischik, Sergey | English Opening: Great Snake Variation | |
| Dec 17, 2025 | Omonov | 1–0 | Atar | Round 4: Omonov, Asrorjon - Atar, Efecan | King's Indian Attack | |
| Dec 16, 2025 | Atar | 1–0 | Abdukhakimov | Round 3: Atar, Efecan - Abdukhakimov, Akbarali | English Opening: King's English Variation | |
| Dec 16, 2025 | Mark Smirnov | 1–0 | Atar | Round 1: Mark Smirnov - Atar, Efecan | Nimzo-Larsen Attack: English Variation | |
| Dec 16, 2025 | Atar | 1–0 | Lebedev | Round 2: Atar, Efecan - Lebedev, Maksim Mikh | English Opening: Great Snake Variation | |
| Aug 4, 2024 | Potrafke | ½–½ | Atar | Round 9: Potrafke, Lukas - Atar, Efecan | French Defense: Schlechter Variation | |
| Aug 4, 2024 | Atar | ½–½ | Tanzmann | Round 8: Atar, Efecan - Tanzmann, Julian | English Opening: King's English Variation | |
| Aug 3, 2024 | Liesendahl | 1–0 | Atar | Round 7: Liesendahl, Felix - Atar, Efecan | French Defense: Rubinstein Variation, Blackburne Defense | |
| Aug 3, 2024 | Atar | 0–1 | Klemenz | Round 6: Atar, Efecan - Klemenz, Luca | English Opening: Anglo-Indian Defense | |
| Aug 2, 2024 | Lasschuit | 0–1 | Atar | Round 5: Lasschuit, Rene - Atar, Efecan | Zukertort Opening: Reversed Grünfeld | |
| Aug 2, 2024 | Atar | ½–½ | Reuter | Round 4: Atar, Efecan - Reuter, Julian-Frank | English Opening: King's English Variation | |
| Aug 1, 2024 | Haarsma | 0–1 | Atar | Round 3: Haarsma, Rob - Atar, Efecan | Queen's Pawn Game: Accelerated London System | |
| Aug 1, 2024 | Atar | 0–1 | Vortmeier | Round 2: Atar, Efecan - Vortmeier, Jan | English Opening: Great Snake Variation | |
| Jul 31, 2024 | Staudacher | 1–0 | Atar | Round 1: Staudacher, Julia - Atar, Efecan | Caro-Kann Defense: Two Knights Attack | |
| Nov 8, 2022 | Plenca | 1–0 | Atar | 25th Open Bavarian Championship | ? | |
| — | Atar | ½–½ | Bohle | Round 3: Atar, Efecan - Bohle, Jasper | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| — | Atar | 1–0 | Schoettker | Round 5: Atar, Efecan - Schoettker, Jochen | English Opening: Anglo-Dutch Defense | |
| — | Atar | 1–0 | Heinzel | Round 7: Atar, Efecan - Heinzel, Thomas | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| — | Echargui | ½–½ | Atar | Round 4: Echargui, Amin - Atar, Efecan | French Defense: Tarrasch Variation | |
| — | ter Steeg | 1–0 | Atar | Round 6: ter Steeg, Marcus, Dr. - Atar, Efecan | Queen's Gambit Accepted | |
| — | Kemna | 1–0 | Atar | Round 8: Kemna, Martin - Atar, Efecan | English Opening: Agincourt Defense | |
