| Jun 20, 2025 | Goeschl | ½–½ | Widner | Round 9: Goeschl, Ortrun - Widner, Stefan | Van Geet Opening | |
| Jun 20, 2025 | Widner | 0–1 | Stadlinger | Round 8: Widner, Stefan - Stadlinger, Lea | English Opening: King's English Variation | |
| Jun 20, 2025 | Polterauer | 1–0 | Widner | Round 7: Polterauer, Chiara - Widner, Stefan | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jun 20, 2025 | Widner | ½–½ | Lomsadze | Round 6: Widner, Stefan - Lomsadze, Irakly | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Jun 20, 2025 | Kummer | 0–1 | Widner | Round 5: Kummer, Helmut - Widner, Stefan | Queen's Gambit Declined: Modern Variation, Normal Line | |
| Jun 19, 2025 | Widner | 0–1 | Vrban | Round 4: Widner, Stefan - Vrban, Damir | English Opening: Anglo-Lithuanian Variation | |
| Jun 19, 2025 | Leitinger | 0–1 | Widner | Round 3: Leitinger, Anton - Widner, Stefan | Sicilian Defense: Kan Variation, Knight Variation | |
| Jun 19, 2025 | Widner | 0–1 | Kienboeck | Round 2: Widner, Stefan - Kienboeck, Benjamin | English Opening: Anglo-Indian Defense | |
| May 31, 2024 | Wolfgang | 0–1 | Widner | Round 9: Wolfgang, Valentin - Widner, Stefan | Modern Defense: Geller's System | |
| May 31, 2024 | Widner | 0–1 | Kummer | Round 8: Widner, Stefan - Kummer, Helmut | English Opening: King's English Variation | |
| May 31, 2024 | Widner | 1–0 | Babinetz | Round 7: Widner, Stefan - Babinetz, Rainer | English Opening: King's English Variation | |
| May 31, 2024 | Kruckenhauser | 1–0 | Widner | Round 6: Kruckenhauser, Arthur - Widner, Stefan | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| May 30, 2024 | Widner | 1–0 | Dzelalagic | Round 5: Widner, Stefan - Dzelalagic, Amir | English Opening: Symmetrical Variation | |
| May 30, 2024 | Erlacher | 0–1 | Widner | Round 4: Erlacher, Herbert - Widner, Stefan | Indian Defense: Przepiorka Variation | |
| May 30, 2024 | Widner | 0–1 | Stadlinger | Round 3: Widner, Stefan - Stadlinger, Lea | English Opening: King's English Variation | |
| May 30, 2024 | Neuschmied | 1–0 | Widner | Round 2: Neuschmied, Siegfried - Widner, Stefan | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
