| May 17, 2026 | Gretzinger | ½–½ | Grabowski | Runde 7: Gretzinger, Maximilian - Grabowski, Joshua | French Defense: Classical Variation | |
| May 16, 2026 | Monnerjahn | 1–0 | Gretzinger | Runde 6: Monnerjahn, Lukas - Gretzinger, Maximilian | Queen's Gambit Declined | |
| May 16, 2026 | Gretzinger | ½–½ | Majewski | Runde 5: Gretzinger, Maximilian - Majewski, Thomas | Sicilian Defense: Taimanov Variation | |
| May 15, 2026 | Grosse-Honebrink | ½–½ | Gretzinger | Runde 4: Grosse-Honebrink, Brigitte - Gretzinger, Maximilian | Slav Defense: Exchange Variation | |
| May 15, 2026 | Gretzinger | ½–½ | Richter | Runde 3: Gretzinger, Maximilian - Richter, Thomas | French Defense: Normal Variation | |
| May 14, 2026 | Baumann | 0–1 | Gretzinger | Runde 2: Baumann, Simon - Gretzinger, Maximilian | Sicilian Defense: Lasker-Pelikan Variation | |
| May 14, 2026 | Gretzinger | ½–½ | Edel | Round 1: Gretzinger, Maximilian - Edel, Thomas | Sicilian Defense: French Variation, Normal | |
| Dec 30, 2025 | Foremny | ½–½ | Gretzinger | DVM U16 2025 | Sicilian Defense: Closed | |
| Dec 29, 2025 | Gretzinger | 0–1 | Buechel | DVM U16 2025 | Sicilian Defense: Moscow Variation, Main Line | |
| Jun 14, 2025 | Gretzinger | 1–0 | Salim | ODJM B 2025 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 13, 2025 | Ihle | ½–½ | Gretzinger | ODJM B 2025 | Queen's Pawn Game: Modern Defense | |
| Jun 12, 2025 | Gretzinger | 0–1 | Schoene | ODJM B 2025 | Sicilian Defense: French Variation | |
| Jun 11, 2025 | Schaechtelin | 1–0 | Gretzinger | ODJM B 2025 | Caro-Kann Defense: Tartakower Variation | |
| Jun 11, 2025 | Gretzinger | ½–½ | Engelhaupt | ODJM B 2025 | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Jun 10, 2025 | Kanno | 0–1 | Gretzinger | ODJM B 2025 | Queen's Pawn Game: Modern Defense | |
| Jun 9, 2025 | Gretzinger | 1–0 | Claussen | ODJM B 2025 | French Defense: King's Indian Attack | |
| Jun 8, 2025 | Er | ½–½ | Gretzinger | ODJM B 2025 | Slav Defense: Modern Line | |
| Jun 8, 2025 | Gretzinger | ½–½ | Golke | ODJM B 2025 | Sicilian Defense: Moscow Variation, Main Line | |
| May 12, 2024 | Peter Schneider | 0–1 | Gretzinger | 3. Itzehoer Schach Open | Sicilian Defense: McDonnell Attack | |
| May 11, 2024 | Gretzinger | 0–1 | Heinrich | 3. Itzehoer Schach Open | Nimzo-Indian Defense: Sämisch Variation | |
| May 11, 2024 | Magezi | 0–1 | Gretzinger | 3. Itzehoer Schach Open | English Opening: King's English Variation | |
| May 10, 2024 | Gretzinger | 1–0 | Hieke | 3. Itzehoer Schach Open (37-58) | Four Knights Game: Italian Variation | |
| May 10, 2024 | Barlage | 1–0 | Gretzinger | 3. Itzehoer Schach Open | Queen's Pawn Game: Accelerated London System | |
| May 9, 2024 | Gretzinger | 0–1 | Alvermann | 3. Itzehoer Schach Open | Sicilian Defense: French Variation, Normal | |
| May 9, 2024 | Khazen | 0–1 | Gretzinger | 3. Itzehoer Schach Open (37-58) | Scotch Game: Modern Defense | |
