Knapp, David
Current rating: 1380
Record: 1-8
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 24 | Skarvelis, Theo (1500) | Lost 1-2 | -171411 |
| 2extended | 326 | Kern, Bill (1483) | Won 2-0 | +201431 |
| 3extended | 346 | Huffnagle, Nathan (1493) | Lost 1-2 | -171414 |
| 4extended | 354 | Thomas, Brian (1483) | Lost 1-2 | -171397 |
| 5extended | 394 | Clark, Dan (1429) | Lost 0-2 | -171380 |
| average opponent: 1478record: 1-4 | new rating: 1380 | |||
| Grand Prix New Jersey 2004 (Mirrodin block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 80 | Smith, Joseph (1500) | Lost 1-2 | -181482 |
| 2block | 296 | Wacha, Erik (1482) | Lost 1-2 | -181464 |
| 3block | 407 | Ganiere, Scott (1466) | Lost 1-2 | -181446 |
| 4block | 448 | Risley, Robin (1446) | Lost 1-2 | -181428 |
| average opponent: 1473record: 0-4 | new rating: 1428 | |||