Cumpston, Douglas
Current rating: 1534
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 380 | Weber, William (1628) | Lost 1-2 | -171554 |
| 3sealed | 713 | Bodger, Steve (1573) | Lost 0-2 | -181536 |
| 4sealed | 747 | Gentry, David (1470) | Won 2-1 | +171553 |
| 5sealed | 528 | George, Sebastian (1517) | Lost 1-2 | -191534 |
| top | average opponent: 1547record: 1-3 | new rating: 1534 | ||
| Grand Prix Cincinnati 2014 (BNG standard) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 396 | Miller, Casey 2 (1347) | Lost 1-2 | -221540 |
| 2standard | 532 | Burgess, Miles (1484) | Won 2-1 | +171557 |
| 3standard | 586 | Maine, Andrew (1610) | Lost 1-2 | -171540 |
| 4standard | 648 | Strehl, James (1483) | Lost 1-2 | -191521 |
| 5standard | 661 | Strause, Brandon (1371) | Won 2-0 | +151536 |
| 6standard | 573 | Geddes, Brian (1483) | Won 2-0 | +171553 |
| 7standard | 432 | Smith, Mitchell (1505) | Won 2-0 | +181571 |
| top | average opponent: 1469record: 4-3 | new rating: 1571 | ||
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 4 | Chapnick, Aaron (1464) | Lost 0-2 | -191481 |
| 2sealed | 582 | Bianchi, Anthony (1412) | Won 2-0 | +171498 |
| 3sealed | 513 | Murphy, Dan (1552) | Lost 0-2 | -171481 |
| 4sealed | 554 | Liao, Albert (1482) | Won 2-0 | +181499 |
| 5sealed | 541 | Horlacher, Travis (1444) | Won 2-0 | +171516 |
| 6sealed | 425 | Besterman, Daniel (1521) | Won 2-0 | +181534 |
| 7sealed | 167 | Muraca, Nick (1787) | Won 2-1 | +231557 |
| 8sealed | 225 | Shenhar, Shahar (2017) | Lost 1-2 | -101547 |
| 9sealed | 209 | Foley, Thomas (1412) | Won 2-0 | +151562 |
| top | average opponent: 1566record: 6-3 | new rating: 1562 | ||