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King County Open
| Full information | website |
| When | September 12-13, 2026 |
| City | Bellevue |
| State | Washington |
| Prize fund | $6,000 |
| Rating system | USCF, FIDE |
| Advanced entries | advanced |
| Registration | register |
| FIDE titles norms possibility | Yes |
| Organizer | Washington Chess Federation |
| Results | results |
