International
Chess Federation
| Event code | 432762 |
| Tournament Name | XXXV Open Internacional de Gros de Ajedrez |
| City | Donostia |
| Country | ESP |
| Number of players | 64 |
| System | s |
| Hybrid | NO |
| Category | 0 |
| Start Date | 2025-09-05 |
| End Date | 2025-09-12 |
| Date received | 0000-00-00 |
| Date registered | 2025-07-22 |
| Type | |
| Time Control | Standard: 90 minutes with 30 second increment from move 1 |
| Zone | |
| Chief Arbiter | Montolio Benedicto, Cesar (ESP) |
| Chief Organizer | |
| Organizer | |
More information: The full list of tournaments received from Spain for October 2025