| Dec 30, 2025 | Stratenwerth | 1–0 | Biessner | Round 7: Stratenwerth, Gerhard - Biessner, Eberhard | Indian Defense: Wade-Tartakower Defense | |
| Dec 30, 2025 | Biessner | 0–1 | Kuhanec | Round 6: Biessner, Eberhard - Kuhanec, David | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 29, 2025 | Kulida | 0–1 | Biessner | Round 5: Kulida, Nazar - Biessner, Eberhard | Petrov's Defense | |
| Dec 29, 2025 | Emekli | 1–0 | Biessner | Round 4: Emekli, Gabriel - Biessner, Eberhard | Alekhine Defense: Four Pawns Attack, Trifunovic Variation | |
| Dec 28, 2025 | Biessner | 0–1 | Weidert | Round 3: Biessner, Eberhard - Weidert, Florian | French Defense: Exchange Variation | |
| Dec 28, 2025 | Luven | 0–1 | Biessner | Round 2: Luven, Thomas - Biessner, Eberhard | Alekhine Defense: Scandinavian Variation | |
| Dec 27, 2025 | Biessner | 0–1 | Panjer | Round 1: Biessner, Eberhard - Panjer, Sidney | King's Indian Attack | |
| Dec 30, 2024 | Biessner | 1–0 | Reimer | Round 7: Biessner, Eberhard - Reimer, Felix Ryu | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Dec 30, 2024 | Peter | 1–0 | Biessner | Round 6: Peter, Thomas - Biessner, Eberhard | Alekhine Defense: Exchange Variation | |
| Dec 29, 2024 | Biessner | 1–0 | Fruehsorger | Round 5: Biessner, Eberhard - Fruehsorger, Dieter | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Dec 29, 2024 | Phylactou | 0–1 | Biessner | Round 4: Phylactou, Michalis - Biessner, Eberhard | Nimzo-Indian Defense | |
| Dec 28, 2024 | Biessner | 0–1 | Noeldner | Round 3: Biessner, Eberhard - Noeldner, Julian | Queen's Pawn Game: Barry Attack | |
| Dec 28, 2024 | Schlenkert | 0–1 | Biessner | Round 2: Schlenkert, Ralf - Biessner, Eberhard | King's Pawn Game: Leonardis Variation | |
| Dec 27, 2024 | Biessner | 0–1 | Walter | Round 1: Biessner, Eberhard - Walter, Andreas | Sicilian Defense: Alapin Variation | |
| Aug 4, 2024 | Biessner | ½–½ | Wolfer | Round 9: Biessner, Eberhard - Wolfer, Noah | Sicilian Defense: Hyperaccelerated Dragon | |
| Aug 4, 2024 | Albersmann | 1–0 | Biessner | Round 8: Albersmann, Rene - Biessner, Eberhard | Alekhine Defense: Scandinavian Variation | |
| Aug 3, 2024 | Biessner | 1–0 | Muennekehoff | Round 7: Biessner, Eberhard - Muennekehoff, Jaro | Sicilian Defense: Accelerated Dragon | |
| Aug 3, 2024 | Deider | 1–0 | Biessner | Round 6: Deider, Kevin - Biessner, Eberhard | Four Knights Game: Scotch Variation Accepted | |
| Aug 2, 2024 | Biessner | 1–0 | Freese | Round 5: Biessner, Eberhard - Freese, Carsten | Modern Defense | |
| Aug 2, 2024 | Lente | 0–1 | Biessner | Round 4: Lente, Marius - Biessner, Eberhard | Queen's Pawn Game: Symmetrical Variation | |
| Aug 1, 2024 | Biessner | 0–1 | Schless | Round 3: Biessner, Eberhard - Schless, Sebastian | Sicilian Defense: Delayed Alapin Variation | |
| Aug 1, 2024 | Grooss | 0–1 | Biessner | Round 2: Grooss, Jochen - Biessner, Eberhard | ? | |
| Jul 31, 2024 | Biessner | 0–1 | Lutze | Round 1: Biessner, Eberhard - Lutze, Max | Sicilian Defense: Hyperaccelerated Dragon | |
