| Game | Result | Opening | Date |
|---|---|---|---|
| Domroese, Michael (1842) – Kolthoff, Siegmund (2065) | 1/2-1/2 | Sicilian Defense: Grand Prix Attack | 2026-07-10 |
| Kolthoff, Siegmund (2065) – Hess, Juergen (1939) | 1/2-1/2 | Catalan Opening: Open Defense, Classical Line | 2026-07-09 |
| Okrajek, Alexander (2199) – Kolthoff, Siegmund (2065) | 1/2-1/2 | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | 2026-07-08 |
| Kolthoff, Siegmund (2065) – Reimann, Reinhold (1892) | 1-0 | Zukertort Opening: Queen's Gambit Invitation | 2026-07-07 |
| Boldt, Heinrich (1825) – Kolthoff, Siegmund (2065) | 0-1 | English Opening: Symmetrical Variation, Fianchetto Variation | 2026-07-06 |
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