Blackwood, Colston
Current rating: 1464
Record: 1-3
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 219 | Mcmann, Shawn (1500) | Lost 0-2 | -181482 |
| 2sealed | 162 | Niemi, Peter (1500) | Won 2-0 | +181500 |
| 3sealed | 276 | Gaydos, Robert (1488) | Lost 0-2 | -181482 |
| 4sealed | 292 | Wiggins, Alexander (1488) | Lost 0-2 | -181464 |
| average opponent: 1494record: 1-3 | new rating: 1464 | |||