| Nov 1, 2025 | Oblender | 1–0 | Koebel | Runde 7: Oblender, Rudi - Koebel, John | Sicilian Defense: Taimanov Variation | |
| Nov 1, 2025 | Koebel | 1–0 | Janulis | Runde 6: Koebel, John - Janulis, Vykintas | Rapport-Jobava System | |
| Nov 1, 2025 | Theile-Rasche | 0–1 | Koebel | Runde 5: Theile-Rasche, Nelson - Koebel, John | Sicilian Defense: French Variation | |
| Oct 31, 2025 | Koebel | ½–½ | Schlenkert | Runde 4: Koebel, John - Schlenkert, Ralf | Queen's Pawn Game: Chigorin Variation | |
| Oct 31, 2025 | Subenko | 1–0 | Koebel | Runde 3: Subenko, Alexander - Koebel, John | Sicilian Defense: French Variation | |
| Oct 30, 2025 | Koebel | 1–0 | Wessels | Runde 2: Koebel, John - Wessels, Keke | Pirc Defense | |
| Oct 30, 2025 | Karich | 1–0 | Koebel | Runde 1: Karich, Oliver - Koebel, John | Tarrasch Defense: Symmetrical Variation | |
| Jan 5, 2025 | Weber | 0–1 | Koebel | Round 7: Weber, Hans-Joachim - Koebel, John | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jan 4, 2025 | Koebel | 0–1 | Menke | Round 6: Koebel, John - Menke, Stefan | Englund Gambit: Main Line | |
| Jan 4, 2025 | Brockmeyer | 0–1 | Koebel | Round 5: Brockmeyer, Sabine - Koebel, John | Indian Defense | |
| Jan 3, 2025 | Koebel | 0–1 | Umhang | Round 4: Koebel, John - Umhang, Tanja | Rapport-Jobava System | |
| Jan 3, 2025 | Claudia Rottmann | 0–1 | Koebel | Round 3: Claudia Rottmann - Koebel, John | Sicilian Defense: French Variation | |
| Jan 2, 2025 | Koebel | 0–1 | Ishcenko | Round 2: Koebel, John - Ishcenko, Volodymyr | Rapport-Jobava System | |
| Jan 2, 2025 | Jens Lehner | 0–1 | Koebel | Round 1: Jens Lehner - Koebel, John | English Opening: Mikenas-Carls Variation | |
| May 25, 2024 | Koebel | ½–½ | Seegebrecht | DEM U10 2024 | English Opening: King's English Variation | |
| May 24, 2024 | Dutta | 1–0 | Koebel | DEM U10 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| May 24, 2024 | Krokhmal | 1–0 | Koebel | DEM U10 2024 | Sicilian Defense: Bowdler Attack | |
| May 23, 2024 | Koebel | 0–1 | Jung | DEM U10 2024 | Rapport-Jobava System | |
| May 22, 2024 | Koebel | 1–0 | Roessling | DEM U10 2024 | Rapport-Jobava System | |
| May 22, 2024 | König | 1–0 | Koebel | DEM U10 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| May 21, 2024 | Link | 0–1 | Koebel | DEM U10 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| May 20, 2024 | Koebel | 0–1 | Wessels | DEM U10 2024 | Indian Defense | |
| May 20, 2024 | Chychkan | 1–0 | Koebel | DEM U10 2024 | Sicilian Defense: Taimanov Variation | |
| May 19, 2024 | Koebel | 0–1 | Schonlau | DEM U10 2024 | Rapport-Jobava System, with e6 | |
| May 19, 2024 | Cremann | 1–0 | Koebel | DEM U10 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
