Duffey, Justin
Current rating: 1479
Record: 6-7
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 148 | Card, Michael (1345) | Lost 1-2 | -221534 |
| 2legacy | 570 | Kostovic, Pavle (1510) | Lost 1-2 | -191515 |
| 3legacy | 727 | Tessier, Michael (1545) | Lost 0-2 | -171498 |
| 4legacy | 755 | Walter, Aaron (1445) | Lost 0-2 | -191479 |
| average opponent: 1461record: 0-4 | new rating: 1479 | |||
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 553 | Liberto, Lance (1474) | Won 2-1 | +181518 |
| 2legacy | 244 | Dentith, Peter (1561) | Lost 1-2 | -181500 |
| 3legacy | 481 | Skelton, Alexander (1519) | Won 2-0 | +191519 |
| 4legacy | 588 | Freytag, Eric (1611) | Lost 1-2 | -171502 |
| 5legacy | 500 | Gillies, Colin (1552) | Won 2-1 | +191521 |
| 6legacy | 455 | Boone, George (1544) | Won 2-1 | +191540 |
| 7legacy | 324 | Leigh, Alina (1487) | Won 2-0 | +171557 |
| 8legacy | 155 | Rizzonelli, Garrett (1508) | Won 2-0 | +171574 |
| 9legacy | 113 | Griffen, Scott (1566) | Lost 0-2 | -181556 |
| average opponent: 1536record: 6-3 | new rating: 1556 | |||