Colby-robbins, Derek
Current rating: 1493
Record: 14-16-1
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 154 | Kmieciak, Christopher (1587) | Won 2-1 | +201486 |
| 2standard | 151 | Pite, Derek (1532) | Lost 0-2 | -171469 |
| 3standard | 378 | Vollick, Matt (1500) | Won 2-1 | +191488 |
| 4standard | 358 | Sandrin, Ryan (1515) | Lost 1-2 | -181470 |
| 5standard | 577 | Bujold, Francis (1504) | Won 2-1 | +191489 |
| 6standard | 285 | Ladouceur, Travis (1706) | Won 2-0 | +221511 |
| 7standard | 310 | Kesminas, Povilas (1533) | Lost 0-2 | -181493 |
| top | average opponent: 1554record: 4-3 | new rating: 1493 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 330 | Weber, Ethan (1488) | Lost 0-2 | -171425 |
| 2modern | 467 | Bence, Chris (1482) | Draw 1-1 | +11426 |
| 3modern | 483 | Gauthier, Michael (1469) | Won 1-0 | +191445 |
| 4modern | 376 | Burrows, Irene (1443) | Won 2-0 | +181463 |
| 5modern | 264 | Kostas, Steven (1601) | Won 2-0 | +211484 |
| 6modern | 166 | Fleisher, Ryan (1526) | Lost 0-2 | -181466 |
| top | average opponent: 1502record: 3-2-1 | new rating: 1466 | ||
| Grand Prix Detroit 2013 (modern) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 331 | Russell, Kyle (1592) | Won 2-1 | +211475 |
| 2modern | 316 | Guinn, Kevin (1520) | Won 0-0 | +191494 |
| 3modern | 33 | Khalaf, Rami (1500) | Lost 1-2 | -181476 |
| 4modern | 392 | McKee, Zack (1518) | Lost 0-2 | -181458 |
| 5modern | 466 | Jobin, Christopher M (1569) | Lost 0-2 | -161442 |
| top | average opponent: 1540record: 2-3 | new rating: 1442 | ||
| Grand Prix Toronto 2012 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 46 | Lewis, Matthew (1586) | Won 2-1 | +201484 |
| 2modern | 21 | Davis, Brandon (1501) | Lost 0-2 | -171467 |
| 3modern | 259 | Smith, Kyle T (1491) | Won 2-0 | +181485 |
| 4modern | 195 | Doherty, Kevin W (1573) | Won 2-0 | +201505 |
| 5modern | 203 | Reid, James (1676) | Lost 1-2 | -151490 |
| 6modern | 179 | Liorti, Andrew (1554) | Lost 1-2 | -171473 |
| 7modern | 285 | Duong, Edward (1503) | Won 2-1 | +181491 |
| 8modern | 194 | Marge, Matthew (1381) | Lost 0-2 | -201471 |
| 9modern | 190 | Miller, Chris J (1513) | Lost 0-2 | -171454 |
| top | average opponent: 1531record: 4-5 | new rating: 1454 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 363 | Jurkovic, Stanley (1500) | Lost 1-2 | -181482 |
| 2sealed | 528 | Zylstra, Richard (1481) | Won 2-1 | +181500 |
| 3sealed | 560 | Hodgins, Trevor (1499) | Lost 0-2 | -181482 |
| 4sealed | 616 | Maccallum, Philip (1485) | Lost 0-2 | -181464 |
| top | average opponent: 1491record: 1-3 | new rating: 1464 | ||