| Jul 24, 2026 | Mueller | 0–1 | Paulsen | Round 8: Mueller, Erich - Paulsen, Dirk | Bird Opening | |
| Jul 23, 2026 | Pruefer | 1–0 | Mueller | Round 7: Pruefer, Friedbert, Prof. Dr. - Mueller, Erich | Philidor Defense: Lion Variation, Lion's Claw, with Bc4 and h6 | |
| Jul 22, 2026 | Mueller | 1–0 | Okrajek | Round 6: Mueller, Erich - Okrajek, Alexander | Bird Opening | |
| Jul 20, 2026 | Erich Mueller | 0–1 | Christian Hess | Round 4: Erich Mueller - Christian Hess | Bird Opening | |
| Jul 19, 2026 | Brueggemann | ½–½ | Erich Mueller | Round 3: Brueggemann, Joachim - Erich Mueller | Sicilian Defense: Godiva Variation | |
| Jul 3, 2026 | Tscharotschkin | 1–0 | Mueller | Round 8: Tscharotschkin, Michael - Mueller, Erich | Queen's Pawn Game: London System | |
| Jul 2, 2026 | Mueller | 1–0 | Graf | Round 7: Mueller, Erich - Graf, Anton, Dr. | Bird Opening: Dutch Variation | |
| Jul 1, 2026 | Berner | ½–½ | Mueller | Round 6: Berner, Juergen - Mueller, Erich | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Jun 30, 2026 | Mueller | 1–0 | Schnepel | Round 5: Mueller, Erich - Schnepel, Thomas | Bird Opening: Dutch Variation | |
| Jun 29, 2026 | Bogumil-Schott | 0–1 | Mueller | Round 4: Bogumil-Schott, Edgar, Dr. - Mueller, Erich | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jun 28, 2026 | Mueller | ½–½ | Kuempers | Round 3: Mueller, Erich - Kuempers, Ulrich | Bird Opening | |
| Jun 27, 2026 | Mueller | 0–1 | Ramin | Round 2: Mueller, Erich - Ramin, Michael | Bird Opening | |
| Jun 26, 2026 | Klueber | 0–1 | Mueller | Round 1: Klueber, Werner - Mueller, Erich | Indian Defense: Budapest Defense, Adler Variation | |
| 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 | |
| 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 | |
| — | 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 | |