Marshall, Colin
Current rating: 1382
| Grand Prix Niagara Falls 2019 (legacy) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 263 | Ostrander, Liam (1500) | Lost 0-2 | -161415 |
| 2legacy | 241 | Crowell, Daniel (1486) | Won 2-1 | +191434 |
| 3legacy | 326 | Henry, Ian (1409) | Lost 0-2 | -181416 |
| 4legacy | 347 | Wyckoff, Coo (1506) | Lost 1-2 | -171399 |
| 5legacy | 389 | Kehoe, Michael (1453) | Lost 1-2 | -171382 |
| top | average opponent: 1471record: 1-4 | new rating: 1382 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 54 | Braid, Jeffrey (1487) | Lost 0-2 | -181465 |
| 2modern | 404 | Sharp, Matthew (1602) | Lost 0-2 | -161449 |
| 3modern | 813 | Lorthios-Guilledroit, Nicolas (1463) | Lost 1-2 | -181431 |
| top | average opponent: 1517record: 0-3 | new rating: 1431 | ||
| Grand Prix Montreal 2017 (AKH standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 2092 | Girard, Jean-Francois (1500) | Won 2-0 | +181518 |
| 2standard | 2095 | Rioux-Richard, Adrien (1517) | Lost 0-2 | -181500 |
| 3standard | 2338 | Stewart, Ryan (1511) | Lost 0-2 | -181482 |
| 4standard | 2321 | Davis, Joshua (1537) | Lost 0-2 | -171465 |
| 5standard | 2405 | Menard, Hugo (1428) | Won 2-0 | +181483 |
| 6standard | 2337 | Dougherty, Aaron (1488) | Won 2-1 | +181501 |
| 7standard | 2294 | Daley, Sean (1505) | Lost 1-2 | -181483 |
| top | average opponent: 1498record: 3-4 | new rating: 1483 | ||