Dorfman, David
Current rating: 1503
Record: 5-6
| Grand Prix New Jersey 2020 (THB limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 297 | Cheney, Colin (1631) | Won 2-0 | +211502 |
| 2sealed | 223 | Xu, Yineng (1467) | Won 2-1 | +181520 |
| 3sealed | 151 | Mitchell, Zane (1953) | Lost 0-1 | -111509 |
| 4sealed | 266 | Nelson, Colleen (1487) | Won 2-1 | +181527 |
| 5sealed | 110 | Andejeski, Jason (1785) | Lost 0-2 | -141513 |
| 6sealed | 298 | Lee, Robert 724 (1952) | Lost 1-2 | -101503 |
| average opponent: 1712record: 3-3 | new rating: 1503 | |||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 357 | Richardson, Becky (1500) | Won 2-1 | +181518 |
| 2sealed | 435 | Flore, April A (1518) | Lost 0-2 | -181500 |
| 3sealed | 643 | McKenna, Michael (1466) | Lost 1-2 | -191481 |
| 4sealed | 598 | Hartmann, Dan (1480) | Won 2-0 | +181499 |
| 5sealed | 513 | BOISMIER, ROBERT (1505) | Lost 1-2 | -181481 |
| average opponent: 1494record: 2-3 | new rating: 1481 | |||