| Nov 1, 2025 | Subenko | ½–½ | Ahrens | Runde 7: Subenko, Alexander - Ahrens, Gunnar | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Nov 1, 2025 | Ahrens | 1–0 | Wallet | Runde 6: Ahrens, Gunnar - Wallet, Norbert | Bird Opening: Dutch Variation | |
| Nov 1, 2025 | Salim | 1–0 | Ahrens | Runde 5: Salim, Florian - Ahrens, Gunnar | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Oct 31, 2025 | Ahrens | 1–0 | Karich | Runde 4: Ahrens, Gunnar - Karich, Oliver | Bird Opening: Dutch Variation | |
| Oct 31, 2025 | Iseke | ½–½ | Ahrens | Runde 3: Iseke, Reinhard - Ahrens, Gunnar | Mikenas Defense | |
| Oct 30, 2025 | Ahrens | 1–0 | Freese | Runde 2: Ahrens, Gunnar - Freese, Hermann | Bird Opening: Dutch Variation | |
| Oct 30, 2025 | Schlenkert | ½–½ | Ahrens | Runde 1: Schlenkert, Ralf - Ahrens, Gunnar | Mikenas Defense | |
| Jul 13, 2025 | Ahrens | 1–0 | Schiller | Round 7: Ahrens, Gunnar - Schiller, Dirk | Bird Opening: Dutch Variation | |
| Jul 11, 2025 | Ahrens | 0–1 | Hanisch | Round 5: Ahrens, Gunnar - Hanisch, Klaus | Bird Opening | |
| Jul 10, 2025 | Bangert | ½–½ | Ahrens | Round 4: Bangert, Udo - Ahrens, Gunnar | Zukertort Opening: Black Mustang Defense | |
| Jul 9, 2025 | Ahrens | ½–½ | Mitschka | Round 3: Ahrens, Gunnar - Mitschka, Manfred | Bird Opening | |
| Jul 7, 2025 | Ahrens | 0–1 | Zschischang | Round 1: Ahrens, Gunnar - Zschischang, Gunnar | Bird Opening: Dutch Variation | |
| Jul 7, 2024 | Ahrens | ½–½ | Andreas Weitz | Round 7: Ahrens, Gunnar - Andreas Weitz | Bird Opening: Dutch Variation | |
| Jul 6, 2024 | Fabregas | 1–0 | Ahrens | Round 6: Fabregas, Oliver - Ahrens, Gunnar | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Jul 5, 2024 | Ahrens | ½–½ | Frankenberger | Round 5: Ahrens, Gunnar - Frankenberger, Ralf | Bird Opening: Dutch Variation | |
| Jul 4, 2024 | Leib | 0–1 | Ahrens | Round 4: Leib, Britta - Ahrens, Gunnar | Nimzowitsch Defense: Scandinavian Variation, Exchange Variation | |
| Jul 3, 2024 | Ahrens | 1–0 | Wulff | Round 3: Ahrens, Gunnar - Wulff, Jens-Peter | Bird Opening: Dutch Variation | |
| Jul 2, 2024 | Meffert | ½–½ | Ahrens | Round 2: Meffert, Claudia - Ahrens, Gunnar | Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin | |
| Jul 1, 2024 | Ahrens | 0–1 | Dannhauer | Round 1: Ahrens, Gunnar - Dannhauer, Frank | Bird Opening: Dutch Variation | |
| Nov 3, 2024 | Meyer | ½–½ | Ahrens | Round 7: Meyer, Tobias - Ahrens, Gunnar | Mikenas Defense | |
| Nov 2, 2024 | Ahrens | 1–0 | Becker | Round 6: Ahrens, Gunnar - Becker, Axel | Bird Opening: Dutch Variation | |
| Nov 2, 2024 | Ulrich | 1–0 | Ahrens | Round 5: Ulrich, Thomas - Ahrens, Gunnar | Nimzowitsch Defense: Declined Variation | |
| Nov 1, 2024 | Ahrens | 0–1 | Ulrich | Round 4: Ahrens, Gunnar - Ulrich, Helena Irene | Bird Opening | |
| Nov 1, 2024 | von Haefen | 0–1 | Ahrens | Round 3: von Haefen, Dieter - Ahrens, Gunnar | Zukertort Opening: Black Mustang Defense | |
| Oct 31, 2024 | Ahrens | 1–0 | Wilmink | Round 2: Ahrens, Gunnar - Wilmink, Marion | Bird Opening | |
| Oct 31, 2024 | Grooss | ½–½ | Ahrens | Round 1: Grooss, Jochen - Ahrens, Gunnar | Mikenas Defense | |
