Williamson, Matthew
Current rating: 1406
Record: 8-15
| Regional Championships San Diego 2023 (ONE standard) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 307 | Willis, Joshua (1535) | Lost 1-2 | -161396 |
| 2standard | 393 | Roth, Conner (1489) | Won 2-0 | +201416 |
| 3standard | 182 | Logan, christian (1504) | Won 2-0 | +201436 |
| 4standard | 99 | Aston, Tim (1521) | Lost 1-2 | -171419 |
| 5standard | 183 | PenDragon, Jesse (1507) | Lost 0-2 | -161403 |
| 6standard | 312 | Prince, Michael (1492) | Won 2-1 | +191422 |
| 7standard | 284 | Woodbury, Elijah (1502) | Lost 1-2 | -161406 |
| top | average opponent: 1507record: 3-4 | new rating: 1406 | ||
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1438 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 97 | Burton, Cody (1678) | Lost 0-2 | -131425 |
| 2legacy | 384 | Dean, William (1503) | Won 2-0 | +191444 |
| 3legacy | 370 | Smelser, Andrew (1505) | Lost 1-2 | -171427 |
| 4legacy | 369 | Ben-Sasson, Eetai (1590) | Lost 0-2 | -151412 |
| top | average opponent: 1569record: 1-3 | new rating: 1412 | ||
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 185 | Endres, Carl (1575) | Won 2-0 | +201486 |
| 2sealed | 209 | Stein, Harrison (1649) | Lost 0-0 | -151471 |
| 3sealed | 436 | Lewis, Stephen (1597) | Lost 0-2 | -161455 |
| 4sealed | 451 | Aguilera Torres, Anderson (1501) | Lost 0-2 | -171438 |
| top | average opponent: 1581record: 1-3 | new rating: 1438 | ||
| Grand Prix Atlanta 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 384 | Truong, Andy (1568) | Lost 0-2 | -171483 |
| 2modern | 525 | Mattox, William (1461) | Lost 0-2 | -181465 |
| 3modern | 717 | Ronquillo, Voltaire (1732) | Lost 0-2 | -131452 |
| 4modern | 717 | Colton, William (1328) | Won 2-0 | +151467 |
| 5modern | 640 | Hodges, Jared (1465) | Won 2-0 | +181485 |
| 6modern | 519 | Cloer, Katie (1485) | Lost 1-2 | -181467 |
| 7modern | 493 | Larsen, Albert (1409) | Won 2-1 | +171484 |
| 8modern | 348 | Gross, Joe (1483) | Lost 0-2 | -181466 |
| top | average opponent: 1491record: 3-5 | new rating: 1466 | ||