Costallos, John P
Current rating: 1481
Record: 3-4
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 440 | Frias, Yamil (1500) | Won 2-1 | +181518 |
| 2standard | 45 | Seeley, Robert (1467) | Lost 1-2 | -191499 |
| 3standard | 436 | De Jesus Velazquez, Ricardo R (1501) | Lost 1-2 | -181481 |
| 4standard | 438 | Williams, Robert (1455) | Won 2-0 | +181499 |
| 5standard | 474 | Chang, Vincent (1499) | Won 2-0 | +181517 |
| 6standard | 229 | Rios, Justin (1530) | Lost 0-2 | -181499 |
| 7standard | 306 | England, Megan (1497) | Lost 0-2 | -181481 |
| average opponent: 1493record: 3-4 | new rating: 1481 | |||