Dortman, Josh A
Current rating: 1395
Record: 1-7
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 371 | Quasney, Robert (1500) | Won 2-1 | +191447 |
| 2standard | 151 | Farinha, Brendan (1446) | Lost 1-2 | -181429 |
| 3standard | 359 | King, Kevin (1467) | Lost 0-2 | -171412 |
| 4standard | 698 | Zaki, Bilal (1482) | Lost 1-2 | -171395 |
| average opponent: 1474record: 1-3 | new rating: 1395 | |||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 113 | Liang, Jiunn Min (1500) | Lost 1-2 | -181482 |
| 2sealed | 236 | Fyffe, Colin (1482) | Lost 0-2 | -181464 |
| 3sealed | 307 | Harrison, Jonathan (1463) | Lost 0-2 | -181446 |
| 4sealed | 327 | Montecalvo, Derek (1446) | Lost 1-2 | -181428 |
| average opponent: 1473record: 0-4 | new rating: 1428 | |||