| Game | Result | Opening | Date |
|---|---|---|---|
| Oster, Klaus (1967) – Koppe, Connor (2073) | 1-0 | Indian Defense: Knights Variation | 2026-09-27 |
| Edwards, Oliver, Dr. (2009) – Oster, Klaus (1967) | 1/2-1/2 | Queen's Gambit Declined | 2026-09-27 |
| Bardorz, Jana (1979) – Oster, Klaus (1967) | 1/2-1/2 | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | 2026-09-27 |
| Oster, Klaus (1967) – Hegmann, Hartmut (2030) | 1-0 | Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line | 2026-09-26 |
| Schunk, Thomas (2137) – Oster, Klaus (1967) | 1-0 | English Opening: Agincourt Defense, Catalan Defense Accepted | 2026-09-26 |
| Boroshnev, Dmytro (1880) – Oster, Klaus (1967) | 0-1 | Caro-Kann Defense: Endgame Variation | 2026-09-26 |
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