Gerszewski, Gabriel R
Current rating: 1439
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 665 | Corruccini, Joe (1445) | Won 2-0 | +171510 |
| 2standard | 724 | Gillis, Daniel (1557) | Lost 1-2 | -171493 |
| 3standard | 845 | Brown, Samuel (1551) | Lost 1-2 | -171476 |
| 4standard | 870 | Frumkin, Aric (1482) | Won 2-1 | +181494 |
| 5standard | 877 | Hope, Michael (1472) | Lost 1-2 | -191475 |
| 6standard | 742 | Zarichny, Brandon (1460) | Lost 1-2 | -181457 |
| 7standard | 784 | Collins, Hunter (1464) | Lost 0-2 | -181439 |
| top | average opponent: 1490record: 2-5 | new rating: 1439 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 364 | Turner, Tim (1484) | Lost 1-2 | -191498 |
| 2legacy | 410 | Partridge, Tommy (1420) | Lost 1-2 | -191479 |
| 3legacy | 758 | Rothweiler, Zachary (1466) | Lost 0-2 | -181461 |
| 4legacy | 802 | Schooley, Tiffany (1316) | Won 2-0 | +151476 |
| 5legacy | 702 | Ehrler, Matthias (1446) | Won 2-0 | +181494 |
| 6legacy | 591 | Du, Justin (1495) | Won 2-1 | +181512 |
| 7legacy | 471 | Miterby, Andre (1453) | Lost 0-2 | -191493 |
| top | average opponent: 1440record: 3-4 | new rating: 1493 | ||
| Grand Prix Detroit 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 105 | Mrozinski, Chris (1500) | Won 2-1 | +181518 |
| 2modern | 131 | Jabbour, George (1518) | Won 0-0 | +181536 |
| 3modern | 24 | Cheng, Nicholas (1444) | Lost 1-2 | -201516 |
| 4modern | 427 | Falcioni, Matthew (1659) | Lost 0-2 | -151501 |
| 5modern | 544 | Bargar, Brandon (1463) | Lost 1-2 | -191482 |
| 6modern | 467 | Colbert, Brett (1432) | Won 2-0 | +171499 |
| 7modern | 342 | Camm, Jacob (1498) | Won 0-0 | +181517 |
| 8modern | 264 | Pulera, Scott (1501) | Won 2-0 | +181535 |
| 9modern | 199 | Spear, Kurtis (1538) | Lost 1-2 | -181517 |
| top | average opponent: 1506record: 5-4 | new rating: 1517 | ||