Roberts, Donald
Current rating: 1453
Record: 4-7
| Grand Prix Orlando 2018 (M19 standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 26 | Nace, George (1561) | Lost 0-2 | -161467 |
| 2standard | 254 | Wissmann, Joseph (1482) | Won 2-0 | +181485 |
| 3standard | 397 | Naidu, Akash (1726) | Lost 1-2 | -141471 |
| 4standard | 394 | McNair, Carson (1434) | Lost 1-2 | -181453 |
| average opponent: 1551record: 1-3 | new rating: 1453 | |||
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 386 | Tyson, Ryan (1500) | Won 2-0 | +181518 |
| 2standard | 268 | Gandy, Jesse (1600) | Won 2-0 | +201538 |
| 3standard | 124 | Coulter, Abigail (1536) | Lost 0-2 | -191519 |
| 4standard | 427 | Deylius, Matt (1619) | Lost 1-2 | -161503 |
| 5standard | 450 | Beasley, Shanice (1360) | Lost 1-2 | -201483 |
| 6standard | 479 | Clark, James (1480) | Won 2-0 | +181501 |
| 7standard | 357 | Shields, Steve (1535) | Lost 0-2 | -181483 |
| average opponent: 1519record: 3-4 | new rating: 1483 | |||