Blackwell, Tony
Current rating: 1478
Record: 3-5
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 77 | Sullivan, Tom (1528) | Lost 1-2 | -171483 |
| 2sealed | 229 | Peretz, Michael (1706) | Won 2-0 | +221505 |
| 3sealed | 242 | Arthur, Jared (1426) | Won 2-0 | +161521 |
| 4sealed | 111 | Pulera, Scott (1539) | Won 2-0 | +181539 |
| 5sealed | 142 | Karamchandani, Arya (1585) | Lost 1-2 | -171522 |
| 6sealed | 128 | Wolbers, Andrew (1690) | Lost 0-2 | -151507 |
| 7sealed | 172 | Arai, Tadayuki (1533) | Lost 0-2 | -171490 |
| 8sealed | 139 | Tse, Felix (1861) | Lost 1-2 | -121478 |
| average opponent: 1608record: 3-5 | new rating: 1478 | |||