| Jul 24, 2026 | Mueller | 0–1 | Syre | Round 8: Mueller, Michael - Syre, Christian | London System | |
| Jul 23, 2026 | Koehler | 0–1 | Mueller | Round 7: Koehler, Gerhard, Dr. - Mueller, Michael | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Jul 22, 2026 | Mueller | ½–½ | Sandner | Round 6: Mueller, Michael - Sandner, Gunter | Indian Defense: London System | |
| Jul 20, 2026 | Michael Mueller | 0–1 | Heck | Round 4: Michael Mueller - Heck, Norbert | London System | |
| Jul 4, 2026 | Mueller | 0–1 | Schaefer | Round 9: Mueller, Michael - Schaefer, Martin, Dr. | Dutch Defense | |
| Jul 3, 2026 | Ahlvers | ½–½ | Mueller | Round 8: Ahlvers, Ullrich - Mueller, Michael | Queen's Gambit Declined: Marshall Defense | |
| Jul 2, 2026 | Mueller | 1–0 | Schnepel | Round 7: Mueller, Michael - Schnepel, Thomas | London System | |
| Jul 1, 2026 | Kuempers | ½–½ | Mueller | Round 6: Kuempers, Ulrich - Mueller, Michael | Queen's Gambit Declined | |
| Jun 30, 2026 | Mueller | ½–½ | Graf | Round 5: Mueller, Michael - Graf, Peter | London System | |
| Jun 29, 2026 | Kapfer | 1–0 | Mueller | Round 4: Kapfer, Thomas - Mueller, Michael | French Defense: King's Indian Attack | |
| Jun 28, 2026 | Mueller | ½–½ | Junger | Round 3: Mueller, Michael - Junger, Ulrich | Wade Defense | |
| Jun 27, 2026 | Stute | 0–1 | Mueller | Round 2: Stute, Wolfgang - Mueller, Michael | Queen's Gambit Declined | |
| Jun 26, 2026 | Mueller | 1–0 | Haug | Round 1: Mueller, Michael - Haug, Siegmund | London System | |
| Jul 10, 2025 | Podat | 1–0 | Mueller | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Sicilian Defense: Open | |
| Jul 9, 2025 | Mueller | ½–½ | Vatter | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Queen's Pawn Game: London System | |
| Jul 8, 2025 | Mueller | ½–½ | Strobel | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Queen's Pawn Game: London System | |
| Jul 7, 2025 | Kraft | 0–1 | Mueller | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Semi-Slav Defense | |
| Jul 6, 2025 | Mueller | ½–½ | Roos | 10. Offene Baden-W?rttembergische Senioren-Einzelmeisterschaft | Queen's Pawn Game: London System | |
| Apr 3, 2025 | Heinbuch | 1–0 | Mueller | Round 6: Heinbuch, Detlef Ulrich - Mueller, Michael | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Apr 2, 2025 | Mueller | ½–½ | Cordts | Round 5: Mueller, Michael - Cordts, Ingo | Queen's Pawn Game: London System | |
| Apr 1, 2025 | Hess | ½–½ | Mueller | Round 4: Hess, Christian - Mueller, Michael | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Mar 31, 2025 | Mueller | 1–0 | Harsch | Round 3: Mueller, Michael - Harsch, Martin | Queen's Pawn Game: London System | |
| Apr 11, 2024 | Mueller | 0–1 | Luciani | Round 6: Mueller, Michael - Luciani, Carlo | Benoni Defense: Old Benoni | |
| Apr 9, 2024 | Heinbuch | 1–0 | Mueller | Round 4: Heinbuch, Detlef Ulrich - Mueller, Michael | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Apr 8, 2024 | Mueller | ½–½ | Vatter | Round 3: Mueller, Michael - Vatter, Hans-Joachim | Indian Defense: London System | |
| Mar 12, 2023 | Michael Mueller | 1–0 | James Patrick Brooks | Round 9: Michael Mueller - James Patrick Brooks | Indian Defense: Wade-Tartakower Defense | |
| Mar 11, 2023 | Michael Mueller | 0–1 | Ralph Althoff | Round 8: Michael Mueller - Ralph Althoff | Queen's Pawn Game: London System | |
| Mar 10, 2023 | Alexis Buchinger | 1–0 | Michael Mueller | Round 7: Alexis Buchinger - Michael Mueller | Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line | |
| Mar 9, 2023 | Michael Mueller | ½–½ | Caspar Linnemann | Round 6: Michael Mueller - Caspar Linnemann | London System | |
| Mar 8, 2023 | Nils Heldenbergh | 1–0 | Michael Mueller | Round 5: Nils Heldenbergh - Michael Mueller | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Mar 7, 2023 | Michael Mueller | 1–0 | Felix Lau | Round 4: Michael Mueller - Felix Lau | Queen's Pawn Game: London System, with e6 | |
| Mar 6, 2023 | Ilja Zaragatski | 1–0 | Michael Mueller | Round 3: Ilja Zaragatski - Michael Mueller | Sicilian Defense | |
| Mar 5, 2023 | Michael Mueller | 1–0 | Markus Hahmann | Round 2: Michael Mueller - Markus Hahmann | Indian Defense: London System | |
| Mar 5, 2023 | Nikolas Lubbe | 1–0 | Michael Mueller | Round 1: Nikolas Lubbe - Michael Mueller | Slav Defense: Quiet Variation, Schallopp Defense | |