McCullough, Robert
Current rating: 1481
Record: 2-3-1
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 425 | Grossman, Jasper (1500) | Lost 0-2 | -181482 |
| 2sealed | 476 | Cruce, Codey (1482) | Won 2-0 | +181500 |
| 3sealed | 337 | Dale, Jess (1498) | Won 2-1 | +181518 |
| 4sealed | 404 | Jones, Derek (1448) | Draw 1-1 | -11517 |
| 5sealed | 332 | Summers, Jonathan (1502) | Lost 0-2 | -191498 |
| 6sealed | 405 | Smith, Rachael (1503) | Lost 0-2 | -171481 |
| average opponent: 1489record: 2-3-1 | new rating: 1481 | |||