| Jun 7, 2026 | Meessen | 1–0 | Muendoerfer | Round 5: Meessen, Max - Muendoerfer, Sebastian | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jun 6, 2026 | Muendoerfer | 1–0 | Stotyn | Round 3: Muendoerfer, Sebastian - Stotyn, Fabian | English Defense | |
| Apr 3, 2026 | Muendoerfer | 0–1 | Klages | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | King's Indian Attack: Wahls Defense | |
| Apr 2, 2026 | Klebsch | 1–0 | Muendoerfer | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation | |
| Apr 1, 2026 | Muendoerfer | 0–1 | Freimuth | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Neo-Grünfeld Defense: Delayed Exchange Variation | |
| Mar 31, 2026 | Muendoerfer | 1–0 | Schoene | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Semi-Slav Defense: Accelerated Move Order | |
| Mar 27, 2026 | Bangert | 1–0 | Muendoerfer | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Queen's Gambit Accepted: Central Variation, Greco Variation | |
| Mar 27, 2026 | Holtwessels | ½–½ | Muendoerfer | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| Mar 27, 2026 | Muendoerfer | ½–½ | Krueger | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | King's Indian Defense: Smyslov Variation | |
| Mar 27, 2026 | Haustein | 0–1 | Muendoerfer | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Caro-Kann Defense: Apocalypse Attack | |
| Mar 9, 2026 | Muendoerfer | 1–0 | Rauschel | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Queen's Gambit Declined: Three Knights Variation | |
| Jun 29, 2025 | Belakhin | ½–½ | Muendoerfer | Round 9: Belakhin, Alexander - Muendoerfer, Sebastian | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 29, 2025 | Muendoerfer | 1–0 | Klettke | Round 8: Muendoerfer, Sebastian - Klettke, Wolfgang | Indian Defense: Knights Variation | |
| Jun 29, 2025 | Seyrek | 0–1 | Muendoerfer | Round 7: Seyrek, Rohat - Muendoerfer, Sebastian | Queen's Gambit Declined: Three Knights Variation | |
| Jun 29, 2025 | Weber | 1–0 | Muendoerfer | Round 6: Weber, Dirk - Muendoerfer, Sebastian | English Opening | |
| Jun 29, 2025 | Muendoerfer | 1–0 | Lammers | Round 5: Muendoerfer, Sebastian - Lammers, Frank, Prof. Dr. | Indian Defense: Knights Variation | |
| Jun 29, 2025 | Kopmann | 1–0 | Muendoerfer | Round 4: Kopmann, Rene - Muendoerfer, Sebastian | Caro-Kann Defense: Breyer Variation | |
| Jun 29, 2025 | Muendoerfer | 1–0 | Graf | Round 3: Muendoerfer, Sebastian - Graf, Joachim | Queen's Gambit Declined: Modern Variation, Normal Line | |
| Jun 29, 2025 | Rogner | ½–½ | Muendoerfer | Round 2: Rogner, Fabio - Muendoerfer, Sebastian | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jun 29, 2025 | Muendoerfer | 1–0 | Haverlandt | Round 1: Muendoerfer, Sebastian - Haverlandt, Jannes | Indian Defense: Knights Variation | |
| Apr 18, 2025 | Muendoerfer | 1–0 | Reinecke | Runde 9: Muendoerfer, Sebastian - Reinecke, Marten | Queen's Indian Defense: Kasparov Variation | |
| Apr 17, 2025 | Bangert | 1–0 | Muendoerfer | Runde 8: Bangert, Jonas - Muendoerfer, Sebastian | Caro-Kann Defense: Main Line | |
| Apr 16, 2025 | Alali | 0–1 | Muendoerfer | Runde 7: Alali, Hashem - Muendoerfer, Sebastian | Caro-Kann Defense: Exchange Variation | |
| Apr 16, 2025 | Muendoerfer | 1–0 | Juettner | Runde 6: Muendoerfer, Sebastian - Juettner, Anton | Dutch Defense: Semi-Leningrad Variation | |
| Apr 15, 2025 | Nikolay Lavrov | 1–0 | Muendoerfer | Runde 5: Nikolay Lavrov - Muendoerfer, Sebastian | Caro-Kann Defense: Karpov Variation | |
| Apr 14, 2025 | Muendoerfer | ½–½ | Schoene | Runde 4: Muendoerfer, Sebastian - Schoene, Finn | Queen's Pawn Game: Zukertort Variation | |
| Apr 13, 2025 | Muendoerfer | 1–0 | Kalusa | Runde 2: Muendoerfer, Sebastian - Kalusa, Lukas | Semi-Slav Defense | |
| Apr 12, 2025 | Schaper | 0–1 | Muendoerfer | Round 1: Schaper, Kai - Muendoerfer, Sebastian | Caro-Kann Defense: Exchange Variation | |
| Apr 11, 2025 | Moeller | 1–0 | Muendoerfer | Runde 3: Moeller, Tom - Muendoerfer, Sebastian | Rapport-Jobava System | |
| May 25, 2024 | Albrecht | ½–½ | Muendoerfer | DEM U14 2024 | Caro-Kann Defense: Karpov Variation | |
| May 24, 2024 | Geist | 0–1 | Muendoerfer | DEM U14 2024 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| May 23, 2024 | Muendoerfer | 1–0 | Xue | DEM U14 2024 | Slav Defense: Exchange Variation, Boor Attack | |
| May 22, 2024 | Muendoerfer | ½–½ | Turel | DEM U14 2024 | Slav Defense: Exchange Variation | |
| May 22, 2024 | Stichter | ½–½ | Muendoerfer | DEM U14 2024 | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| May 21, 2024 | Muendoerfer | ½–½ | Burkart | DEM U14 2024 | Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation | |
| May 20, 2024 | Nemitz | 1–0 | Muendoerfer | DEM U14 2024 | Trompowsky Attack: Classical Defense, Big Center Variation | |
| May 19, 2024 | Muendoerfer | ½–½ | Neuhoff | DEM U14 2024 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 19, 2024 | Jablonski | 0–1 | Muendoerfer | DEM U14 2024 | Catalan Opening | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Drygala | Round 2: Muendoerfer, Sebastian - Drygala, Lars | Queen's Indian Defense: Kasparov Variation | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Koelling | Round 5: Muendoerfer, Sebastian - Koelling, Jonah | King's Indian Defense | |
| Dec 7, 2024 | Muendoerfer | ½–½ | Mittelstaedt | Round 7: Muendoerfer, Sebastian - Mittelstaedt, Hendrik | Dutch Defense: Queen's Knight Variation | |
| Dec 7, 2024 | Muendoerfer | 0–1 | Wetterau | Round 9: Muendoerfer, Sebastian - Wetterau, Nathanael | Queen's Pawn Game: Modern Defense | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Schoengart | Round 11: Muendoerfer, Sebastian - Schoengart, Ralf | Slav Defense | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Tarasenko | Round 13: Muendoerfer, Sebastian - Tarasenko, Nazar | Benoni Defense: Old Benoni | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Zehe | Round 15: Muendoerfer, Sebastian - Zehe, Marc-Kevin | Slav Defense: Czech Variation, Dutch Variation | |
| Dec 7, 2024 | Muendoerfer | 0–1 | Voege | Round 17: Muendoerfer, Sebastian - Voege, Tobias | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Hagemann | Round 19: Muendoerfer, Sebastian - Hagemann, Sven | Semi-Slav Defense: Noteboom Variation | |
| Dec 7, 2024 | Muendoerfer | 0–1 | Tonndorf | Round 21: Muendoerfer, Sebastian - Tonndorf, Matthias | Bogo-Indian Defense: Vitolins Variation | |
| Dec 7, 2024 | Muendoerfer | 1–0 | Buchenau | Round 23: Muendoerfer, Sebastian - Buchenau, Frank | Queen's Indian Defense: Kasparov Variation | |
| Dec 7, 2024 | Sauer | 0–1 | Muendoerfer | Round 1: Sauer, Tim - Muendoerfer, Sebastian | Yusupov-Rubinstein System | |
| Dec 7, 2024 | Happe | 0–1 | Muendoerfer | Round 3: Happe, Reinhold - Muendoerfer, Sebastian | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Dec 7, 2024 | Ewert | 1–0 | Muendoerfer | Round 4: Ewert, Hannes - Muendoerfer, Sebastian | Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line | |
| Dec 7, 2024 | Weber | 1–0 | Muendoerfer | Round 6: Weber, Dirk - Muendoerfer, Sebastian | Caro-Kann Defense: Breyer Variation | |
| Dec 7, 2024 | Boettcher | 1–0 | Muendoerfer | Round 8: Boettcher, Christian, Dr. - Muendoerfer, Sebastian | Caro-Kann Defense: Breyer Variation | |
| Dec 7, 2024 | Stotyn | 0–1 | Muendoerfer | Round 10: Stotyn, Fabian - Muendoerfer, Sebastian | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| Dec 7, 2024 | Hampel | 0–1 | Muendoerfer | Round 12: Hampel, Felix - Muendoerfer, Sebastian | English Opening: Symmetrical Variation, Four Knights Variation | |
| Dec 7, 2024 | Weisser | 0–1 | Muendoerfer | Round 14: Weisser, Andreas - Muendoerfer, Sebastian | Nimzo-Larsen Attack: Indian Variation | |
| Dec 7, 2024 | Schmitt | ½–½ | Muendoerfer | Round 16: Schmitt, Dirk - Muendoerfer, Sebastian | Indian Defense | |
| Dec 7, 2024 | Koehne | ½–½ | Muendoerfer | Round 18: Koehne, Arno - Muendoerfer, Sebastian | Queen's Gambit Declined | |
| Dec 7, 2024 | Lehmann | 1–0 | Muendoerfer | Round 20: Lehmann, Holger - Muendoerfer, Sebastian | Queen's Gambit Declined: Exchange Variation | |
| Dec 7, 2024 | Schulze | 1–0 | Muendoerfer | Round 22: Schulze, Torben, Dr. - Muendoerfer, Sebastian | Caro-Kann Defense: Advance Variation | |
| Aug 3, 2024 | Willand | ½–½ | Muendoerfer | Round 5: Willand, Oliver - Muendoerfer, Sebastian | Sicilian Defense: Closed | |
| Aug 2, 2024 | Muendoerfer | ½–½ | Bender | Round 4: Muendoerfer, Sebastian - Bender, Wolfgang | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| Aug 2, 2024 | Pick | ½–½ | Muendoerfer | Round 3: Pick, Max - Muendoerfer, Sebastian | Torre Attack: Classical Defense | |
| Aug 1, 2024 | Muendoerfer | 1–0 | Schelkmann | Round 2: Muendoerfer, Sebastian - Schelkmann, Carl | Queen's Gambit Declined: Janowski Variation | |
| Aug 1, 2024 | Braeuer | 0–1 | Muendoerfer | Round 1: Braeuer, Karl-Heinz - Muendoerfer, Sebastian | Queen's Indian Defense: Petrosian Variation | |
| Jan 7, 2023 | Muendoerfer | ½–½ | Poelig | Lower Saxony Championship | A | Tarrasch Defense: Two Knights Variation | |
| Jan 7, 2023 | Muendoerfer | ½–½ | Kurt | Lower Saxony Championship | A | Benko Gambit Accepted: King Walk Variation | |
| — | Muendoerfer | 1–0 | Ay | Round 2: Muendoerfer, Sebastian - Ay, Furkan | East Indian Defense | |
| — | Muendoerfer | ½–½ | Eichner | Round 3: Muendoerfer, Sebastian - Eichner, Sebastian | Indian Defense: Polish Variation | |
| — | Muendoerfer | ½–½ | Neumann | Round 5: Muendoerfer, Sebastian - Neumann, Michael | East Indian Defense | |
| — | Muendoerfer | ½–½ | Renner | Round 7: Muendoerfer, Sebastian - Renner, Kai | Dutch Defense | |
| — | Meschke | 0–1 | Muendoerfer | Round 1: Meschke, Oliver - Muendoerfer, Sebastian | Rapport-Jobava System | |
| — | Heermann | 0–1 | Muendoerfer | Round 4: Heermann, Kai - Muendoerfer, Sebastian | Queen's Indian Defense: Fianchetto Variation, Sämisch Variation | |
| — | Laubsch | ½–½ | Muendoerfer | Round 6: Laubsch, Bernd - Muendoerfer, Sebastian | Caro-Kann Defense: Advance Variation | |