Powell, Coby
Current rating: 1538
Record: 7-6
| Grand Prix Seattle 2019 (MH1 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 377 | Uy, Michael (1673) | Won 2-1 | +211521 |
| A2sealed | 478 | Chang, Robin (1599) | Won 2-1 | +201541 |
| A3sealed | 158 | Ritter, Jacob (1880) | Won 2-0 | +241565 |
| A4sealed | 3 | Harding, Tommy (1770) | Lost 1-2 | -151550 |
| A5sealed | 95 | Kusakabe, Kyohei (1643) | Won 2-0 | +201570 |
| A6sealed | 96 | Li, Steven (1665) | Lost 0-2 | -161554 |
| A7sealed | 140 | Brandow, Sean (1558) | Lost 1-2 | -181536 |
| B1sealed | 280 | Reilly, Michael (1624) | Won 2-0 | +191555 |
| B2sealed | 286 | Richards, Nathan (1516) | Lost 0-2 | -181537 |
| B3sealed | 367 | Miranda, Paul (1454) | Won 2-0 | +161553 |
| B4sealed | 196 | Buckman, Creyson (1577) | Won 2-0 | +191572 |
| B5sealed | 177 | Barnes, Joel (1748) | Lost 0-2 | -151557 |
| B6sealed | 310 | Osorio, Martin (1508) | Lost 1-2 | -191538 |
| average opponent: 1632record: 7-6 | new rating: 1538 | |||