| Jan 5, 2026 | Subenko | 0–1 | Baumann | Runde 7: Subenko, Alexander - Baumann, Simon | French Defense: Exchange Variation | |
| Jan 4, 2026 | Lesser | 1–0 | Baumann | Runde 6: Lesser, Luan - Baumann, Simon | French Defense: Wing Gambit | |
| Jan 4, 2026 | Baumann | 0–1 | ter Stal | Runde 5: Baumann, Simon - ter Stal, Lars | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Jan 3, 2026 | Krumschmidt | 1–0 | Baumann | Runde 4: Krumschmidt, Michael - Baumann, Simon | Queen's Gambit Accepted | |
| Jan 3, 2026 | Baumann | 0–1 | Gottschalk | Runde 3: Baumann, Simon - Gottschalk, Siegfried | French Defense: Schlechter Variation | |
| Jan 2, 2026 | Schnier | ½–½ | Baumann | Runde 2: Schnier, Steffen - Baumann, Simon | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jan 2, 2026 | Baumann | ½–½ | Burkhardt | Runde 1: Baumann, Simon - Burkhardt, Holger | Italian Game: Paris Defense | |
| Oct 5, 2025 | Baumann | ½–½ | Wander | Round 5: Baumann, Simon - Wander, Dennis | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Oct 4, 2025 | Krain | ½–½ | Baumann | Round 4: Krain, Rafael - Baumann, Simon | Queen's Pawn Game: Zukertort Variation | |
| Oct 4, 2025 | Baumann | ½–½ | Lievenbruck | Round 3: Baumann, Simon - Lievenbruck, Matthias | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Oct 3, 2025 | Madelmayer | ½–½ | Baumann | Round 2: Madelmayer, Maik - Baumann, Simon | French Defense: Rubinstein Variation, Blackburne Defense | |
| Oct 3, 2025 | Baumann | 0–1 | Henke | Round 1: Baumann, Simon - Henke, Jaron | Caro-Kann Defense: Accelerated Panov Attack | |
| Jul 13, 2025 | Neumann | ½–½ | Baumann | Round 7: Neumann, Ingo - Baumann, Simon | French Defense: Advance Variation | |
| Jul 12, 2025 | Baumann | ½–½ | Burnus | Round 6: Baumann, Simon - Burnus, Finn Crispin | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jul 12, 2025 | Tittmann | 0–1 | Baumann | Round 5: Tittmann, Julian - Baumann, Simon | English Opening: Agincourt Defense | |
| Jul 11, 2025 | Baumann | ½–½ | Grabowski | Round 4: Baumann, Simon - Grabowski, Petra | Sicilian Defense: Taimanov Variation | |
| Jul 11, 2025 | Wirries | 0–1 | Baumann | Round 3: Wirries, Frank-Michael, Dr. - Baumann, Simon | French Defense: King's Indian Attack | |
| Jul 10, 2025 | Baumann | 0–1 | Marzik | Round 2: Baumann, Simon - Marzik, Arne | French Defense: Schlechter Variation | |
| Jul 10, 2025 | Klinke | 1–0 | Baumann | Round 1: Klinke, Roland, Dr. - Baumann, Simon | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jun 29, 2025 | Juettner | 0–1 | Baumann | Round 9: Juettner, Anton - Baumann, Simon | French Defense: Steiner Variation | |
| Jun 29, 2025 | Baumann | 1–0 | Trosin | Round 8: Baumann, Simon - Trosin, Moritz | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jun 29, 2025 | Rogner | 1–0 | Baumann | Round 7: Rogner, Fabio - Baumann, Simon | French Defense: Advance Variation, Main Line | |
| Jun 29, 2025 | Baumann | 0–1 | Stiller | Round 6: Baumann, Simon - Stiller, Maximilian | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jun 29, 2025 | Panskus | ½–½ | Baumann | Round 5: Panskus, Martin - Baumann, Simon | French Defense: Advance Variation, Main Line | |
| Jun 29, 2025 | Baumann | 1–0 | Hampel | Round 4: Baumann, Simon - Hampel, Thomas | Scandinavian Defense: Valencian Variation, Main Line | |
| Jun 29, 2025 | Langer | 1–0 | Baumann | Round 3: Langer, Michael S. - Baumann, Simon | Tarrasch Defense: Symmetrical Variation | |
| Jun 29, 2025 | Lammers | ½–½ | Baumann | Round 2: Lammers, Frank, Prof. Dr. - Baumann, Simon | English Opening: King's English Variation, Three Knights System | |
| Jun 29, 2025 | Baumann | ½–½ | Cichy | Round 1: Baumann, Simon - Cichy, Michael, Dr. | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 14, 2025 | Doescher | 0–1 | Baumann | DEM U12 2025 | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| Jun 13, 2025 | Baumann | ½–½ | Al Luwaisi | DEM U12 2025 | French Defense: Schlechter Variation | |
| Jun 12, 2025 | Koenig | 0–1 | Baumann | DEM U12 2025 | King's Indian Attack | |
| Jun 11, 2025 | Baumann | 1–0 | Huebner | DEM U12 2025 | Sicilian Defense: Taimanov Variation | |
| Jun 11, 2025 | Nikonenko | 1–0 | Baumann | DEM U12 2025 | Queen's Gambit Accepted | |
| Jun 10, 2025 | Baumann | 0–1 | Aliyev | DEM U12 2025 | French Defense: Schlechter Variation | |
| Jun 9, 2025 | Braren | 1–0 | Baumann | DEM U12 2025 | French Defense: Exchange Variation | |
| Jun 8, 2025 | Steinbrenner | 1–0 | Baumann | DEM U12 2025 | Rapport-Jobava System, with e6 | |
| Jun 8, 2025 | Baumann | ½–½ | Kottage | DEM U12 2025 | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jul 28, 2024 | Baumann | 1–0 | Krueger | Round 7: Baumann, Simon - Krueger, Andreas | Nimzowitsch Defense: Declined Variation | |
| Jul 28, 2024 | Matthias Bergner | 0–1 | Baumann | Round 6: Matthias Bergner - Baumann, Simon | French Defense: Advance Variation, Main Line | |
| Jul 27, 2024 | Baumann | ½–½ | Beerbaum | Round 5: Baumann, Simon - Beerbaum, Frank | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 27, 2024 | Kreipe | ½–½ | Baumann | Round 4: Kreipe, Magnus - Baumann, Simon | Semi-Slav Defense: Noteboom Variation | |
| Jul 26, 2024 | Baumann | 0–1 | Schmidt | Round 3: Baumann, Simon - Schmidt, Karsten-Ruediger | Scandinavian Defense: Icelandic-Palme Gambit | |
| Jul 26, 2024 | Baumann | ½–½ | Krain | Round 2: Baumann, Simon - Krain, Rafael | Scandinavian Defense: Valencian Variation | |
| Jul 25, 2024 | Krneta | ½–½ | Baumann | Round 1: Krneta, Slavko - Baumann, Simon | French Defense: Advance Variation | |
| Nov 3, 2024 | Baumann | ½–½ | Kandora | Round 7: Baumann, Simon - Kandora, Max | Petrov's Defense: Classical Attack | |
| Nov 2, 2024 | Baumann | 0–1 | Drozd | Round 5: Baumann, Simon - Drozd, Maciej | French Defense: Steiner Variation | |
| Nov 2, 2024 | Kandora | 0–1 | Baumann | Round 6: Kandora, William - Baumann, Simon | English Opening: King's English Variation | |
| Nov 1, 2024 | Baumann | 1–0 | Kuhlins | Round 3: Baumann, Simon - Kuhlins, Niklas | Sicilian Defense: Taimanov Variation | |
| Nov 1, 2024 | Kopylov | 1–0 | Baumann | Round 4: Kopylov, Diana - Baumann, Simon | French Defense: Rubinstein Variation, Blackburne Defense | |
| Oct 31, 2024 | Baumann | 1–0 | Wachtel | Round 1: Baumann, Simon - Wachtel, Edwin | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Oct 31, 2024 | Schroeder | ½–½ | Baumann | Round 2: Schroeder, Harm - Baumann, Simon | French Defense: Advance Variation, Main Line | |
| — | Baumann | ½–½ | Mohammed | Round 3: Baumann, Simon - Mohammed, Amin | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | |
| — | Baumann | ½–½ | Pflug | Round 4: Baumann, Simon - Pflug, Anton | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| — | Baumann | ½–½ | Alsleben | Round 6: Baumann, Simon - Alsleben, Moritz | French Defense: Schlechter Variation | |
| — | Zitzewitz | 0–1 | Baumann | Round 1: Zitzewitz, Roland - Baumann, Simon | Queen's Gambit Accepted: Rosenthal Variation | |
| — | Yeganyan | 1–0 | Baumann | Round 2: Yeganyan, Artur - Baumann, Simon | French Defense: Exchange Variation | |
| — | Schubert | ½–½ | Baumann | Round 5: Schubert, Matthias - Baumann, Simon | French Defense: Rubinstein Variation, Blackburne Defense | |
| — | Zuerik | ½–½ | Baumann | Round 7: Zuerik, Walter - Baumann, Simon | Queen's Pawn Game: Zukertort Variation | |