| Jun 29, 2025 | Klebsch | 1–0 | Lammers | Round 9: Klebsch, Tobias - Lammers, Frank, Prof. Dr. | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jun 29, 2025 | Lammers | 0–1 | Clasen | Round 8: Lammers, Frank, Prof. Dr. - Clasen, Dirk | English Opening: Anglo-Indian Defense, Hedgehog System | |
| Jun 29, 2025 | Sviridov | 0–1 | Lammers | Round 7: Sviridov, Vitaliy - Lammers, Frank, Prof. Dr. | Indian Defense | |
| Jun 29, 2025 | Lammers | 0–1 | Lueders Vega | Round 6: Lammers, Frank, Prof. Dr. - Lueders Vega, Iago Ernst | English Opening: Symmetrical Variation | |
| Jun 29, 2025 | Muendoerfer | 1–0 | Lammers | Round 5: Muendoerfer, Sebastian - Lammers, Frank, Prof. Dr. | Indian Defense: Knights Variation | |
| Jun 29, 2025 | Lammers | 1–0 | Koths | Round 4: Lammers, Frank, Prof. Dr. - Koths, Peter | English Opening: Agincourt Defense, Catalan Defense | |
| Jun 29, 2025 | Poelig | 0–1 | Lammers | Round 3: Poelig, Juergen - Lammers, Frank, Prof. Dr. | Zukertort Opening | |
| Jun 29, 2025 | Lammers | ½–½ | Baumann | Round 2: Lammers, Frank, Prof. Dr. - Baumann, Simon | English Opening: King's English Variation, Three Knights System | |
| Jun 29, 2025 | Heuer | 1–0 | Lammers | Round 1: Heuer, Joerg - Lammers, Frank, Prof. Dr. | Queen's Pawn Game: Colle System | |
| Nov 22, 2024 | Lammers | ½–½ | Bury | Round 1: Lammers, Frank, Prof. Dr. - Bury, Tobias | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Nov 24, 2024 | Dian | 0–1 | Lammers | Round 5: Dian, Marcel - Lammers, Frank, Prof. Dr. | Rapport-Jobava System | |
| Nov 23, 2024 | Lammers | ½–½ | Siemes | Round 4: Lammers, Frank, Prof. Dr. - Siemes, Robert | Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line | |
