| Jul 6, 2026 | Stummeyer | 0–1 | Krueger | Round 1: Stummeyer, Dieter - Krueger, Wolfgang | Caro-Kann Defense: Gurgenidze System | |
| Jun 30, 2026 | Wild | 1–0 | Stummeyer | Round 5: Wild, Helmut - Stummeyer, Dieter | English Opening: Symmetrical Variation | |
| Jun 29, 2026 | Stummeyer | ½–½ | Brettschneider | Round 4: Stummeyer, Dieter - Brettschneider, Karl | Sicilian Defense: Löwenthal Variation | |
| Jun 28, 2026 | Klipsch | * | Stummeyer | Round 3: Klipsch, Norbert - Stummeyer, Dieter | ? | |
| Jun 26, 2026 | Heck | 1–0 | Stummeyer | Round 1: Heck, Norbert - Stummeyer, Dieter | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jul 13, 2025 | Heise | 1–0 | Stummeyer | Round 7: Heise, Juergen - Stummeyer, Dieter | Nimzo-Larsen Attack: English Variation | |
| Jul 12, 2025 | Stummeyer | ½–½ | Poetke | Round 6: Stummeyer, Dieter - Poetke, Dan-Peter | Caro-Kann Defense: Classical Variation | |
| Jul 11, 2025 | Stern | ½–½ | Stummeyer | Round 5: Stern, Geoffrey - Stummeyer, Dieter | Rapport-Jobava System | |
| Jul 9, 2025 | Barten | 1–0 | Stummeyer | Round 3: Barten, Ralf - Stummeyer, Dieter | English Opening: Symmetrical Variation | |
| Jul 8, 2025 | Stummeyer | ½–½ | Birken | Round 2: Stummeyer, Dieter - Birken, Michael | Sicilian Defense: Dragon Variation, Classical Variation | |
| Jul 7, 2024 | Stummeyer | ½–½ | Barten | Round 7: Stummeyer, Dieter - Barten, Ralf | Caro-Kann Defense: Main Line | |
| Jul 5, 2024 | Stummeyer | 0–1 | Renner | Round 5: Stummeyer, Dieter - Renner, Bernd | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Jul 3, 2024 | Stummeyer | ½–½ | Gerhard Schmidt | Round 3: Stummeyer, Dieter - Gerhard Schmidt | Alekhine Defense: Four Pawns Attack | |
| Jul 1, 2024 | Okrajek | 0–1 | Stummeyer | Round 1: Okrajek, Alexander - Stummeyer, Dieter | Modern Defense | |