| Jul 13, 2025 | Heinemann | 1–0 | Krueger | Round 7: Heinemann, Ernst - Krueger, Wolfgang | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jul 12, 2025 | Stuemer | 0–1 | Heinemann | Round 6: Stuemer, Paul - Heinemann, Ernst | Benoni Defense: Benoni-Indian Defense | |
| Jul 11, 2025 | Heinemann | 1–0 | Fabig | Round 5: Heinemann, Ernst - Fabig, Holger | French Defense: Normal Variation | |
| Jul 9, 2025 | Heinemann | 1–0 | Domroese | Round 3: Heinemann, Ernst - Domroese, Michael | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jul 8, 2025 | Baerthel | 0–1 | Heinemann | Round 2: Baerthel, Klaus - Heinemann, Ernst | Modern Defense: Three Pawns Attack | |
| Jul 7, 2025 | Heinemann | 1–0 | Brandt | Round 1: Heinemann, Ernst - Brandt, Joachim | French Defense: Advance Variation, Euwe Variation | |
| Jul 3, 2025 | Koehler | 1–0 | Heinemann | Round 4: Koehler, Gerhard, Dr. - Heinemann, Ernst | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jun 9, 2024 | von Mettenheim | 1–0 | Heinemann | Round 4: von Mettenheim, Johannes - Heinemann, Ernst | Zukertort Opening: Kingside Fianchetto | |
| Jun 8, 2024 | Aden | ½–½ | Heinemann | Round 3: Aden, Keno - Heinemann, Ernst | Benko Gambit Declined: Main Line | |
| Apr 1, 2024 | Bashirov | 1–0 | Heinemann | Round 9: Bashirov, Kemal - Heinemann, Ernst | Indian Defense: Spielmann-Indian | |
| Apr 1, 2024 | Heinemann | ½–½ | Iolis | Round 8: Heinemann, Ernst - Iolis, Oleg | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Mar 31, 2024 | Heinemann | 1–0 | Toniolo | Round 6: Heinemann, Ernst - Toniolo, Samuel | Sicilian Defense | |
| Mar 30, 2024 | Reichardt | ½–½ | Heinemann | Round 5: Reichardt, Robin - Heinemann, Ernst | Benko Gambit Accepted: Fully Accepted Variation | |
| Mar 30, 2024 | Heinemann | 1–0 | Garnacho Velasco | Round 4: Heinemann, Ernst - Garnacho Velasco, Eduardo | Scandinavian Defense: Main Line | |
| Mar 29, 2024 | Reichardt | ½–½ | Heinemann | Round 3: Reichardt, Gert - Heinemann, Ernst | Caro-Kann Defense | |
| Mar 29, 2024 | Heinemann | 1–0 | Jovanovic | Round 2: Heinemann, Ernst - Jovanovic, Lucas | Bishop's Opening: Vienna Hybrid | |
| Mar 28, 2024 | Plotz | ½–½ | Heinemann | Round 1: Plotz, Noah - Heinemann, Ernst | English Opening: Symmetrical Variation | |
| Jan 7, 2023 | Heinemann | ½–½ | Evering | Lower Saxony Championship | A | King's Gambit Accepted: Bishop's Gambit, Cozio Variation | |
| Jan 7, 2023 | Schermeier | ½–½ | Heinemann | Lower Saxony Championship | A | English Opening: Symmetrical Variation, Botvinnik System | |
| Jan 5, 2023 | Weigand | ½–½ | Heinemann | Lower Saxony Championship | A | Sicilian Defense: Alapin Variation | |
