| 4 abr 2026 | Harakis, Alexis M 2192 | Zeidler, Sven P. 2118 | 0-1 | D07 Gambito de Dama rehusado: Chigorin Defense | Welsh Championships 2026 | Closed | 43 | Ver |
| 23 mar 2026 | Bullen, Alex 2029 | Zeidler, Sven P. 2118 | ½-½ | D02 Apertura de Peón de Dama: Chigorin Variation | Welsh Championships 2026 | Closed | 53 | Ver |
| 23 mar 2026 | Zeidler, Sven P. 2118 | Rathbone-Jones, Ifan 2163 | 1-0 | B23 Defensa Siciliana: Closed | Welsh Championships 2026 | Closed | 49 | Ver |
| 23 mar 2026 | Zeidler, Sven P. 2118 | Camacho Collados, Jose 2348 | ½-½ | B12 Defensa Caro-Kann: Maróczy Variation | Welsh Championships 2026 | Closed | 28 | Ver |