Warren, Douglas
Current rating: 1397
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 713 | Carey, Adam (1500) | Lost 1-2 | -171414 |
| 2modern | 1109 | Reardon, Justin (1477) | Lost 0-2 | -171397 |
| top | average opponent: 1488record: 0-2 | new rating: 1397 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 366 | Urban, Christopher (1500) | Lost 0-2 | -171447 |
| 2sealed | 534 | Dagenais, Karl (1482) | Won 2-0 | +181465 |
| 3sealed | 570 | Fulk, Mark (1502) | Lost 0-2 | -171448 |
| 4sealed | 672 | Kelly, Matthew (1481) | Lost 0-2 | -171431 |
| top | average opponent: 1491record: 1-3 | new rating: 1431 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 119 | Marlowe, Will S (1500) | Lost 0-2 | -181482 |
| 2sealed | 235 | Dixon, Thomas (1482) | Lost 1-2 | -181464 |
| top | average opponent: 1491record: 0-2 | new rating: 1464 | ||