Grosofsky, Charles
Current rating: 1530
Record: 8-6
| Grand Prix Columbus 2019 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 103 | Mork, Elliot (1538) | Lost 1-2 | -171481 |
| 2modern | 187 | Anderson, Edward (1481) | Won 2-0 | +181499 |
| 3modern | 239 | Kisor, Tanner (1498) | Won 2-1 | +181517 |
| 4modern | 157 | Bubash, Aaron (1517) | Lost 0-2 | -181499 |
| 5modern | 151 | Pino, Sean (1500) | Won 2-0 | +181517 |
| 6modern | 94 | Selim, Paul (1483) | Won 2-0 | +181535 |
| 7modern | 96 | Ingram, Michael (1560) | Won 2-0 | +181553 |
| 8modern | 49 | Bridges, Kayla (1274) | Lost 0-2 | -231530 |
| average opponent: 1481record: 5-3 | new rating: 1530 | |||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 600 | Stanec, Matthew (1494) | Lost 1-2 | -181482 |
| 2modern | 815 | Tarnawsky, Andrew (1464) | Lost 1-2 | -181464 |
| 3modern | 1187 | Miller, Dakota (1462) | Won 2-0 | +181482 |
| 4modern | 1129 | Patrick, Cameron (1498) | Won 2-1 | +181500 |
| 5modern | 608 | San Miguel, Tomas (1502) | Won 2-0 | +181518 |
| 6modern | 478 | Schoenherr, James (1440) | Lost 0-2 | -201498 |
| average opponent: 1476record: 3-3 | new rating: 1498 | |||