Robertson, Joseph G
Current rating: 1482
Record: 2-3-1
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 175 | Veen, Andrew (1517) | Lost 0-2 | -181482 |
| 2sealed | 437 | Maine, Robert (1482) | Won 2-0 | +181500 |
| 3sealed | 338 | Schmidt, Neil E (1482) | Lost 0-2 | -181482 |
| 4sealed | 484 | Glastra, Josh (1483) | Lost 1-2 | -181464 |
| 5sealed | 460 | Gautier, Nathaniel (1464) | Draw 1-1 | 01464 |
| 6sealed | 403 | Butterfield, Guy (1464) | Won 2-0 | +181482 |
| average opponent: 1482record: 2-3-1 | new rating: 1482 | |||