Hartford, Stephen
Current rating: 1405
| Grand Prix Montreal 2018 (GRN limited) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 271 | Cowley, Bruce (1482) | Lost 1-2 | -181437 |
| 2sealed | 257 | Guite, Ely (1610) | Lost 0-2 | -151422 |
| 3sealed | 475 | Butler, Christopher (1481) | Lost 0-2 | -171405 |
| top | average opponent: 1524record: 0-3 | new rating: 1405 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 144 | Peedin, Lydia (1500) | Won 2-0 | +181488 |
| 2sealed | 48 | Menchaca, Jose (1594) | Lost 0-2 | -161472 |
| 3sealed | 202 | Morikis, Vasilios (1505) | Lost 0-2 | -171455 |
| top | average opponent: 1533record: 1-2 | new rating: 1455 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 425 | Ridgway, Colin (1500) | Won 2-0 | +181518 |
| 2sealed | 511 | Sprowls, Brandon (1578) | Lost 0-2 | -171501 |
| 3sealed | 601 | Doran, Shaun (1753) | Lost 0-2 | -131488 |
| 4sealed | 698 | Martelli, Paul (1482) | Lost 1-2 | -191469 |
| 5sealed | 669 | Wong, Mung (1483) | Lost 1-2 | -171452 |
| 6sealed | 624 | Cochran, Todd (1450) | Won 2-0 | +181470 |
| top | average opponent: 1541record: 2-4 | new rating: 1470 | ||