| Game | Result | Opening | Date |
|---|---|---|---|
| Jacobi, Felix-Hagen (2056) – Sieber, Bert (2134) | 0-1 | Sicilian Defense: McDonnell Attack | 2026-08-09 |
| Sieber, Bert (2134) – Tonndorf, Matthias (2229) | 0-1 | English Defense | 2026-08-09 |
| de Voogt, Juergen (2254) – Sieber, Bert (2134) | 0-1 | Sicilian Defense: Closed | 2026-08-08 |
| Sieber, Bert (2134) – Laubsch, Bernd (2156) | 1/2-1/2 | Grünfeld Defense: Russian Variation, Hungarian Variation | 2026-08-08 |
| Sieber, Bert (2134) – Juergenpott, Maximilian (1867) | 1-0 | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | 2026-08-07 |
| Tietje, Daniel (1943) – Sieber, Bert (2134) | 0-1 | Zukertort Opening | 2026-08-07 |
| Nizamova, Rita (1895) – Sieber, Bert (2134) | 1/2-1/2 | Sicilian Defense: Kramnik Variation | 2026-08-06 |
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