Matthews, David
Current rating: 1490
Record: 7-8
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 43 | Yee, Allen (1598) | Won 2-0 | +201501 |
| 2legacy | 3 | Noonan, Christopher (1702) | Lost 1-2 | -141487 |
| 3legacy | 358 | Walker, Nicholas (1554) | Won 2-0 | +191506 |
| 4legacy | 266 | Kinsey, David (1472) | Lost 1-2 | -191487 |
| 5legacy | 387 | Johnsen, Erik (1501) | Won 2-0 | +191506 |
| 6legacy | 204 | Ho, William (1627) | Lost 1-2 | -161490 |
| average opponent: 1576record: 3-3 | new rating: 1490 | |||
| Grand Prix Oakland 2016 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 42 | Choi, Jihoon (1500) | Lost 0-2 | -181482 |
| 2standard | 693 | Nguyen, Andrew (1535) | Lost 0-2 | -171465 |
| 3standard | 867 | Jordan, James (1241) | Won 2-0 | +141479 |
| 4standard | 715 | Ortiz, David (1555) | Lost 1-2 | -171462 |
| 5standard | 725 | Chen, Kuang (1647) | Lost 0-2 | -141448 |
| 6standard | 757 | McGee, Mark (1385) | Won 2-0 | +171465 |
| 7standard | 648 | Cota, Nicholas (1379) | Won 2-0 | +161481 |
| 8standard | 525 | Ballaris, Edward (1484) | Won 2-0 | +181499 |
| 9standard | 438 | Nolte, Micah (1498) | Lost 1-2 | -181481 |
| average opponent: 1469record: 4-5 | new rating: 1481 | |||