Black, Grant T
Current rating: 1530
Record: 8-7
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 94 | Lo, Ryan H (1500) | Won 2-0 | +181483 |
| 2extended | 237 | Griffin, Blair (1518) | Won 2-1 | +191502 |
| 3extended | 126 | Aten, Timothy (1794) | Won 2-0 | +231525 |
| 4extended | 19 | Chodan, Ross (1591) | Won 2-0 | +191544 |
| 5extended | 26 | Heath, Christopher (1504) | Lost 0-2 | -181526 |
| 6extended | 59 | Jacks, Andy (1601) | Won 2-0 | +191545 |
| 7extended | 58 | Mize, Logan (1623) | Lost 1-2 | -171528 |
| 8extended | 115 | Lachmann, Chris (1697) | Won 2-0 | +211549 |
| 9extended | 71 | Six, Brian (1497) | Lost 1-2 | -191530 |
| average opponent: 1592record: 6-3 | new rating: 1530 | |||
| Grand Prix Columbus 2007 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 165 | Perry, Hannah (1500) | Won 2-1 | +181518 |
| 2legacy | 58 | McGregor, Pat (1624) | Lost 0-2 | -161502 |
| 3legacy | 203 | Moes, Nathaniel (1504) | Lost 1-2 | -181484 |
| 4legacy | 283 | Bacon, Zachary D (1482) | Lost 1-2 | -181466 |
| 5legacy | 334 | Edwards, Susan (1409) | Won 2-1 | +171483 |
| 6legacy | 302 | Meyer, Jeffrey W (1469) | Lost 1-2 | -181465 |
| average opponent: 1498record: 2-4 | new rating: 1465 | |||