| Nov 1, 2025 | Wilmink | 0–1 | von Haefen | Runde 7: Wilmink, Marion - von Haefen, Dieter | Pirc Defense | |
| Nov 1, 2025 | Caspari | ½–½ | von Haefen | Runde 6: Caspari, Christian-Tim - von Haefen, Dieter | Pirc Defense | |
| Nov 1, 2025 | von Haefen | 1–0 | Freese | Runde 5: von Haefen, Dieter - Freese, Hermann | Indian Defense: Anti-Nimzo-Indian | |
| Oct 31, 2025 | Reiter | 1–0 | von Haefen | Runde 4: Reiter, Brigitte - von Haefen, Dieter | London System | |
| Oct 31, 2025 | Theile-Rasche | 1–0 | von Haefen | Runde 3: Theile-Rasche, Ingo - von Haefen, Dieter | Pirc Defense: Classical Variation | |
| Oct 30, 2025 | von Haefen | ½–½ | Gulamov | Runde 2: von Haefen, Dieter - Gulamov, Elmir | Slav Defense: Quiet Variation, Schallopp Defense | |
| Oct 30, 2025 | von Haefen | 1–0 | Schaefer | Runde 1: von Haefen, Dieter - Schaefer, Immanuel | English Opening: Anglo-Indian Defense, Scandinavian Defense | |
| Jun 1, 2024 | Meyer | * | von Haefen | Round 5: Meyer, Lars - von Haefen, Dieter | ? | |
| May 31, 2024 | Weyer | * | von Haefen | Round 3: Weyer, Jonas - von Haefen, Dieter | ? | |
| Nov 3, 2024 | von Haefen | ½–½ | Tanukusuma | Round 7: von Haefen, Dieter - Tanukusuma, Kyllian Gotthold | French Defense: Knight Variation | |
| Nov 2, 2024 | von Haefen | ½–½ | Grooss | Round 5: von Haefen, Dieter - Grooss, Jochen | Réti Opening | |
| Nov 2, 2024 | Freese | 0–1 | von Haefen | Round 6: Freese, Hermann - von Haefen, Dieter | Indian Defense: West Indian Defense | |
| Nov 1, 2024 | von Haefen | 0–1 | Ahrens | Round 3: von Haefen, Dieter - Ahrens, Gunnar | Zukertort Opening: Black Mustang Defense | |
| Nov 1, 2024 | Flucke | 1–0 | von Haefen | Round 4: Flucke, Felix - von Haefen, Dieter | Pirc Defense: Austrian Attack, Weiss Variation | |
| Oct 31, 2024 | von Haefen | 1–0 | Noennig | Round 1: von Haefen, Dieter - Noennig, Nina | Zukertort Opening: Pirc Invitation | |
| Oct 31, 2024 | Witte | ½–½ | von Haefen | Round 2: Witte, Volker, Dr. - von Haefen, Dieter | Grünfeld Defense: Exchange Variation, Classical Variation | |
