| Sep 26, 2025 | Born | ½–½ | Mueller | Round 6: Born, Mario - Mueller, Erich | Rat Defense: English Rat | |
| Sep 24, 2025 | Schatz | ½–½ | Mueller | Round 4: Schatz, Christian - Mueller, Erich | Philidor Defense: Lion Variation | |
| Sep 21, 2025 | Mueller | 1–0 | Gottschall | Round 1: Mueller, Erich - Gottschall, Ina | Bird Opening | |
| Jul 9, 2025 | Mueller | ½–½ | Kirszenberg | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Bird Opening: Dutch Variation | |
| Jul 8, 2025 | Namyslo | ½–½ | Mueller | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Pirc Defense | |
| Jul 7, 2025 | Mueller | ½–½ | Kapfer | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Bird Opening | |
| Jul 13, 2024 | Cichy | ½–½ | Mueller | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Wade Defense | |
| Jul 12, 2024 | Mueller | ½–½ | Braeuner | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Bird Opening | |
| Jul 11, 2024 | Strobel | 0–1 | Mueller | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Pirc Defense: Austrian Attack, Unzicker Attack | |
| Jul 10, 2024 | Mueller | ½–½ | Hagen | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Bird Opening: From's Gambit | |
| Jul 9, 2024 | Habibi | ½–½ | Mueller | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation | |
| Jul 8, 2024 | Mueller | ½–½ | Kirszenberg | 9. offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Bird Opening: Dutch Variation | |
| Apr 12, 2024 | Strobel | ½–½ | Mueller | Round 7: Strobel, Walter - Mueller, Erich | Sicilian Defense: Classical Variation | |
| Apr 9, 2024 | Mueller | 0–1 | Belke | Round 4: Mueller, Erich - Belke, Frank, Dr. | Bird Opening: Dutch Variation | |
| Sep 10, 2024 | Christoffel | 1–0 | Mueller | Round 8: Christoffel, Ulrich - Mueller, Erich | Sicilian Defense: Taimanov Variation, Normal Variation | |
| Sep 8, 2024 | Kalepky | ½–½ | Mueller | Round 6: Kalepky, Helmut - Mueller, Erich | Sicilian Defense: Closed | |
| Sep 7, 2024 | Mueller | 0–1 | Sicker | Round 5: Mueller, Erich - Sicker, Rolf | Bird Opening: Dutch Variation | |
| Sep 6, 2024 | Rooze | 1–0 | Mueller | Round 4: Rooze, Jan - Mueller, Erich | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Sep 5, 2024 | Mueller | 1–0 | Denker | Round 3: Mueller, Erich - Denker, Hans-Peter | Bird Opening | |
| Sep 4, 2024 | Haertner | 0–1 | Mueller | Round 2: Haertner, Helmut, Dr. - Mueller, Erich | Rat Defense: English Rat | |
| Sep 3, 2024 | Mueller | 1–0 | Weber | Round 1: Mueller, Erich - Weber, Martin | Bird Opening: Dutch Variation | |
| Sep 5, 2023 | Mueller | 1–0 | Van Kesteren | 20. RLP-Senioren-Open | Bird Opening | |
| — | Mueller | 1–0 | Schoenfeld | Round 2: Mueller, Erich - Schoenfeld, Volker | Bird Opening | |
| — | Mueller | 0–1 | Kristensen | Round 3: Mueller, Erich - Kristensen, Leif | Bird Opening | |
| — | Mueller | ½–½ | Krueger | Round 5: Mueller, Erich - Krueger, Erich | Bird Opening | |
| — | Mueller | 1–0 | Hesse | Round 7: Mueller, Erich - Hesse, Uwe | ? | |
| — | Mueller | ½–½ | Latas | Round 9: Mueller, Erich - Latas, Boguslaw | Bird Opening | |
| — | Uneken | 0–1 | Mueller | Round 1: Uneken, Bert - Mueller, Erich | Rat Defense: English Rat | |
| — | Haertner | 0–1 | Mueller | Round 4: Haertner, Helmut, Dr. - Mueller, Erich | English Opening | |
| — | Schmidt | ½–½ | Mueller | Round 6: Schmidt, Matthias - Mueller, Erich | Wade Defense | |
| — | Siebenhaar | ½–½ | Mueller | Round 8: Siebenhaar, Erich - Mueller, Erich | Pirc Defense | |
