Cumpston, Charles
Current rating: 1527
Record: 4-3
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 58 | Palmer, Sean (1465) | Lost 1-2 | -191481 |
| 2standard | 234 | Darby, Joseph (1392) | Won 2-0 | +171498 |
| 3standard | 313 | Greene Jr., Carl (1500) | Won 2-0 | +181516 |
| 4standard | 247 | Chen, Gregory (1829) | Won 2-1 | +231539 |
| 5standard | 193 | Chandler, Charles (1556) | Won 2-1 | +191558 |
| 6standard | 112 | Walker, Jeff (1574) | Lost 0-2 | -181540 |
| 7standard | 99 | Ward, Daniel (1846) | Lost 1-2 | -131527 |
| average opponent: 1594record: 4-3 | new rating: 1527 | |||