Gamarra, Efrain
Current rating: 1549
Record: 6-3
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 237 | Grace, Jared (1464) | Won 2-1 | +171517 |
| 2standard | 97 | Parus, Alexander (1464) | Won 2-0 | +171534 |
| 3standard | 11 | Newnam, Matthew (1517) | Lost 1-2 | -181516 |
| 4standard | 268 | Bonilla, Luis (1562) | Won 2-1 | +191535 |
| 5standard | 222 | Tejada, Victor (1485) | Won 2-1 | +171552 |
| 6standard | 126 | Jones, Greg S (1596) | Won 2-0 | +191571 |
| 7standard | 97 | McGovern, Clint (1506) | Lost 0-2 | -191552 |
| 8standard | 158 | Miller, Robert (1493) | Won 2-0 | +171569 |
| 9standard | 113 | Rodgers, Logan (1484) | Lost 1-2 | -201549 |
| average opponent: 1508record: 6-3 | new rating: 1549 | |||