DeForge, Jonathan
Current rating: 1569
| Grand Prix Charlotte 2015 (modern) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 479 | Koch, Chris (1500) | Won 2-0 | +181530 |
| 2modern | 225 | D'Adesky, Andrew (1548) | Won 2-1 | +181548 |
| 3modern | 251 | Nguyen, Kevin (1603) | Lost 0-2 | -171531 |
| 4modern | 401 | Posey, Matthew (1534) | Lost 0-2 | -181513 |
| 5modern | 427 | Wright, Christopher (1540) | Won 2-0 | +191532 |
| 6modern | 381 | Lamer, Matthew (1501) | Won 2-0 | +171549 |
| 7modern | 334 | Drake, William (1563) | Won 2-0 | +191568 |
| 8modern | 328 | Paton, Jon (1685) | Won 2-1 | +201588 |
| 9modern | 276 | Smith, Jason A (1570) | Lost 1-2 | -191569 |
| top | average opponent: 1560record: 6-3 | new rating: 1569 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1716 | Graff, Joseph (1520) | Lost 0-2 | -181533 |
| 2legacy | 1818 | Renner, Richard (1467) | Won 2-0 | +171550 |
| 3legacy | 1777 | Gauci, Dana (1505) | Lost 1-2 | -191531 |
| 4legacy | 1923 | McKee, Kevin (1505) | Lost 1-2 | -191512 |
| top | average opponent: 1499record: 1-3 | new rating: 1512 | ||
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 403 | Miller, Robert (1428) | Lost 0-2 | -191481 |
| 2standard | 481 | Goldberg, Louis (1463) | Won 2-0 | +171498 |
| 3standard | 267 | Brace, Donald (1499) | Won 2-1 | +181516 |
| 4standard | 366 | Fillichio, Giovanni (1517) | Won 2-1 | +181534 |
| 5standard | 233 | Vergo, Eric (1638) | Lost 1-2 | -161518 |
| 6standard | 326 | Ramirez, Erick (1533) | Won 2-0 | +191537 |
| 7standard | 141 | Hill, Dan (1400) | Won 2-0 | +151552 |
| 8standard | 79 | Heminway, Curtis (1556) | Lost 0-2 | -181534 |
| 9standard | 149 | Jacobs, Steven (1493) | Won 2-0 | +171551 |
| top | average opponent: 1503record: 6-3 | new rating: 1551 | ||