Williamson, Tim
Current rating: 1502
Record: 3-3
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 11 | Tonner, Gordon (1596) | Lost 0-2 | -161484 |
| 2standard | 543 | Sparks, Thomas (1485) | Won 2-1 | +181502 |
| 3standard | 374 | Chrisman, Josiah (1551) | Won 2-1 | +191521 |
| 4standard | 311 | Rikhof, Daven (1539) | Won 2-1 | +181539 |
| 5standard | 235 | Ganzeveld, Robert (1540) | Lost 1-2 | -181521 |
| 6standard | 303 | Cain, Lewis (1489) | Lost 0-2 | -191502 |
| average opponent: 1533record: 3-3 | new rating: 1502 | |||