| Mar 28, 2026 | Esser | 1–0 | Oppitz | Round 4: Esser, Julian - Oppitz, Peter | Alekhine Defense: Exchange Variation | |
| Mar 28, 2026 | Oppitz | 1–0 | Adelmeyer | Round 3: Oppitz, Peter - Adelmeyer, Matti | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Dec 20, 2025 | Guelsen | 1–0 | Oppitz | Round 4: Guelsen, Taylan - Oppitz, Peter | Rapport-Jobava System | |
| Jul 13, 2025 | Kargoll | 1–0 | Oppitz | Round 7: Kargoll, Boris, Dr. - Oppitz, Peter | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jul 12, 2025 | Oppitz | ½–½ | Rabus | Round 6: Oppitz, Peter - Rabus, Berthold | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Jul 11, 2025 | Oppitz | 1–0 | Ritter | Round 5: Oppitz, Peter - Ritter, Uwe | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jul 10, 2025 | Bub | 1–0 | Oppitz | Round 4: Bub, Volker - Oppitz, Peter | Sicilian Defense: French Variation | |
| Jul 9, 2025 | Oppitz | ½–½ | Zschischang | Round 3: Oppitz, Peter - Zschischang, Marine | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jul 8, 2025 | Oppitz | 1–0 | Bojko | Round 2: Oppitz, Peter - Bojko, Pavel | Petrov's Defense: Classical Attack, Jaenisch Variation | |
| Jul 7, 2025 | Schroeder | 0–1 | Oppitz | Round 1: Schroeder, Frank - Oppitz, Peter | Rapport-Jobava System | |
| Jun 29, 2025 | Oppitz | 1–0 | Noack | Round 9: Oppitz, Peter - Noack, Reiner | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jun 29, 2025 | Pothast | 0–1 | Oppitz | Round 8: Pothast, Laurenz - Oppitz, Peter | Sicilian Defense: Closed | |
| Jun 29, 2025 | Oppitz | 1–0 | Juergens | Round 7: Oppitz, Peter - Juergens, Florian | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 29, 2025 | Ponyrko | 0–1 | Oppitz | Round 6: Ponyrko, Matviy - Oppitz, Peter | Polish Opening: King's Indian Variation, Sokolsky Attack | |
| Jun 29, 2025 | Langer | ½–½ | Oppitz | Round 5: Langer, Michael S. - Oppitz, Peter | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Jun 29, 2025 | Oppitz | 0–1 | Nechitaylo | Round 4: Oppitz, Peter - Nechitaylo, Nikita | Sicilian Defense: Kalashnikov Variation | |
| Jun 29, 2025 | Oppitz | 1–0 | Rogner | Round 3: Oppitz, Peter - Rogner, Fabio | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 29, 2025 | Koths | ½–½ | Oppitz | Round 2: Koths, Peter - Oppitz, Peter | Sicilian Defense: Taimanov Variation, Szén Variation | |
| Jun 29, 2025 | Oppitz | 1–0 | Felis | Round 1: Oppitz, Peter - Felis, Timo | Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line | |
