| Apr 26, 2026 | Schaefer | 0–1 | Koellner | Round 15: Schaefer, Markus - Koellner, Ruben Gideon | Philidor Defense: Lion Variation | |
| Apr 25, 2026 | Kjartansson | ½–½ | Schaefer | Round 14: Kjartansson, Gudmundur - Schaefer, Markus | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Apr 24, 2026 | Schaefer | ½–½ | Levin | BL 2526 SG Solingen - Düsseldorfer SK | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Mar 1, 2026 | Schaefer | ½–½ | Krause | 1. BL Pauli | Sicilian Defense: Taimanov Variation | |
| Feb 28, 2026 | Heinemann | ½–½ | Schaefer | 1. BL Pauli | French Defense: Tarrasch Variation, Morozevich Variation | |
| Feb 8, 2026 | Vetoshko | 0–1 | Schaefer | Deutsche Schach-Bundesliga | French Defense: Classical Variation, Steinitz Variation | |
| Feb 7, 2026 | Schaefer | ½–½ | Wagner | Deutsche Schach-Bundesliga | Sicilian Defense: Najdorf Variation, English Attack | |
| Dec 20, 2025 | Reuber | 0–1 | Schaefer | Round 3: Reuber, Ella - Schaefer, Markus | King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | |
| Dec 12, 2025 | Schaefer | 1–0 | Oezdemir | Round 4: Schaefer, Markus - Oezdemir, Anna Valentina | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Dec 12, 2025 | Richter | ½–½ | Schaefer | Round 5: Richter, Andre - Schaefer, Markus | Modern Defense: Standard Defense | |
| Apr 25, 2025 | Schaefer | 0–1 | Bologan | Schachbundesliga | Sicilian Defense: Pin Variation | |
| Feb 23, 2025 | Sivuk | ½–½ | Schaefer | Round 9: Sivuk, Vitaly - Schaefer, Markus | Semi-Slav Defense | |
| Feb 22, 2025 | Schaefer | ½–½ | Van der Hagen | Round 8: Schaefer, Markus - Van der Hagen, Loek | Ruy Lopez: Cozio Defense | |
| Apr 28, 2024 | Schaefer | 0–1 | Movsesian | SchachBuli Runde 15 | Sicilian Defense: French Variation | |
| Jan 14, 2024 | Schaefer | ½–½ | Voege | Bundesliga 2023/2024 | French Defense: Tarrasch Variation, Open System, Main Line | |
| Apr 29, 2023 | Schaefer | ½–½ | Schmidek | Schachbundesliga | Caro-Kann Defense: Classical Variation | |
| Oct 17, 2021 | Lokander | ½–½ | Schaefer | Schachbundesliga | Slav Defense: Quiet Variation | |
| Oct 15, 2021 | Schaefer | ½–½ | Begnis | BL19-21 | Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line | |
