Kromm, Derek
Current rating: 1588
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 761 | Kinton, Nicholas (1469) | Lost 0-2 | -191541 |
| 2legacy | 1190 | Wloczewski, Jonathan (1481) | Won 2-1 | +161557 |
| 3legacy | 1168 | Westbrook, Robert (1451) | Won 2-1 | +171574 |
| 4legacy | 1097 | Waldman, Lyle (1494) | Won 2-1 | +161590 |
| 5legacy | 812 | Broer, Paul (1573) | Draw 1-1 | 01590 |
| 6legacy | 725 | Charlton, Andrew (1537) | Won 2-0 | +171607 |
| 7legacy | 656 | Prodigalidad, Tate (1554) | Lost 0-2 | -191588 |
| top | average opponent: 1508record: 4-2-1 | new rating: 1588 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 254 | Mercado, Sonia (1518) | Lost 0-2 | -181500 |
| 3standard | 603 | Lewis, Christopher (1447) | Won 2-0 | +171517 |
| 4standard | 483 | Albanese, Nicholas (1502) | Won 2-0 | +181535 |
| 5standard | 205 | Hornung Jr, Mark (1397) | Won 2-1 | +151550 |
| 6standard | 216 | Fennell, Christopher (2118) | Won 2-0 | +281578 |
| 7standard | 90 | Partington, Josh (1644) | Won 2-0 | +191597 |
| 8standard | 31 | Kurth, Lloyd (1585) | Lost 1-2 | -181579 |
| 9standard | 109 | Smith, Ashford (1559) | Lost 0-2 | -191560 |
| top | average opponent: 1596record: 5-3 | new rating: 1560 | ||
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 28 | Nguy, Thanh (1446) | Lost 0-2 | -191481 |
| 2sealed | 394 | Wallace, Scott (1430) | Won 2-1 | +171498 |
| 3sealed | 298 | Pucci, Giuseppe (1500) | Won 2-0 | +181516 |
| 4sealed | 290 | Colic, Alexander (1461) | Lost 0-2 | -191497 |
| 5sealed | 336 | Chisolm, Steven (1496) | Lost 0-2 | -181479 |
| 6sealed | 306 | Fung, John (1484) | Won 2-0 | +181497 |
| 7sealed | 217 | Villamizar, Daniel (1607) | Won 2-0 | +201517 |
| 8sealed | 149 | Gu, Jiong (1579) | Won 2-0 | +191536 |
| 9sealed | 126 | Chenglin, Yiping (1517) | Lost 1-2 | -181518 |
| top | average opponent: 1502record: 5-4 | new rating: 1518 | ||