Williamson, Brad
Current rating: 1447
Record: 2-6
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1475 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 280 | Blanchard, Wes (1703) | Lost 0-2 | -141461 |
| 3modern | 295 | Smith, Allen (1472) | Won 2-1 | +181479 |
| 4modern | 312 | Brisky, Chris (1630) | Lost 0-2 | -151464 |
| 5modern | 306 | Montijo, Jesus (1527) | Lost 1-2 | -171447 |
| average opponent: 1583record: 1-3 | new rating: 1447 | |||
| Grand Prix Atlanta 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 252 | Tierney, Justin (1556) | Won 2-1 | +191519 |
| 2modern | 182 | Feeney, Luke (1819) | Lost 0-2 | -131506 |
| 3modern | 535 | Taylor, Hunter (1700) | Lost 0-2 | -141492 |
| 4modern | 628 | Hoyle, Jacob (1539) | Lost 0-2 | -171475 |
| average opponent: 1654record: 1-3 | new rating: 1475 | |||