International
Chess Federation
| Event code | 433461 |
| Tournament Name | 91st Southwest Open |
| City | McAllen, TX |
| Country | USA |
| Number of players | 40 |
| System | s |
| Hybrid | NO |
| Category | 0 |
| Start Date | 2025-08-28 |
| End Date | 2025-09-01 |
| Date received | 0000-00-00 |
| Date registered | 2025-07-28 |
| Type | |
| Time Control | Standard: 90 minutes with 30 second increment from move 1 |
| Zone | |
| Reported mult. round days | 4 |
| Chief Arbiter | Underwood, Martha (USA) |
| Deputy Chief Arbiter | Guerra, Anthony (USA) Newman, Richard (USA) |
| Chief Organizer | Ortiz, David (USA) |
| Organizer | |
More information: The full list of tournaments received from United States of America for October 2025