| 24 jul 2026 | Mueller, Erich 2065 | Paulsen, Dirk 2302 | 0-1 | A02 Apertura Bird | German Chess Championship 2026 | Seniors 65+ | 90 | Ver |
| 23 jul 2026 | Pruefer, Friedbert, Prof. Dr. 2196 | Mueller, Erich 2065 | 1-0 | C41 Defensa Philidor: Lion Variation, Lion's Claw, with Bc4 and h6 | German Chess Championship 2026 | Seniors 65+ | 41 | Ver |
| 22 jul 2026 | Mueller, Erich 2065 | Okrajek, Alexander 2199 | 1-0 | A02 Apertura Bird | German Chess Championship 2026 | Seniors 65+ | 31 | Ver |
| 3 jul 2026 | Tscharotschkin, Michael 2208 | Mueller, Erich 2065 | 1-0 | D02 Apertura de Peón de Dama: London System, with e6 | 11. Open Baden-Württembergische Senior Championchip | 19 | Ver |
| 26 sep 2025 | Born, Mario 2145 | Mueller, Erich 2103 | ½-½ | A41 Defensa Rata: English Rat | German Senior Team Championship of the State Associations | S50 | 14 | Ver |
| 24 sep 2025 | Schatz, Christian 2121 | Mueller, Erich 2103 | ½-½ | C41 Defensa Philidor: Lion Variation | German Senior Team Championship of the State Associations | S50 | 18 | Ver |