Gammill, Stephen
Current rating: 1467
Record: 1-3
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 415 | King, Chandler (1500) | Won 2-1 | +181518 |
| 2modern | 179 | Hicks, Jackson (1487) | Lost 1-2 | -191499 |
| 3modern | 313 | Tran, Minh (1700) | Lost 0-0 | -141485 |
| 4modern | 445 | Blackburn, Jeremy (1464) | Lost 1-2 | -181467 |
| average opponent: 1538record: 1-3 | new rating: 1467 | |||