Williamson, Mark
Current rating: 1445
Record: 2-5
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 245 | Gillins, Lee (1500) | Lost 1-2 | -181482 |
| 2standard | 536 | Light, Nathan (1482) | Lost 1-2 | -181464 |
| 3standard | 637 | Fickert, Andy (1464) | Lost 0-2 | -181446 |
| 4standard | 638 | Gaston, Samuel (1462) | Won 2-0 | +181464 |
| 5standard | 568 | Adams, Larissa (1466) | Lost 0-2 | -181446 |
| 6standard | 512 | Fry, Joseph (1398) | Won 2-0 | +171463 |
| 7standard | 409 | Berry, Ethan (1420) | Lost 0-2 | -181445 |
| average opponent: 1456record: 2-5 | new rating: 1445 | |||