Marshall, Ed W
Current rating: 1447
Record: 1-4-2
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 88 | Sharp, Johnathan (1500) | Draw 1-1 | 01500 |
| 2extended | 258 | Goh, Darwin (1555) | Lost 0-2 | -171483 |
| 3extended | 374 | Morrill, Alex (1484) | Lost 0-2 | -181465 |
| 4extended | 433 | Harden, Carl (1464) | Draw 1-1 | 01465 |
| 5extended | 398 | Christesen, Brian (1464) | Won 2-0 | +181483 |
| 6extended | 334 | Smith, Noah (1480) | Lost 0-2 | -181465 |
| 7extended | 281 | Pike, Maitland (1447) | Lost 0-2 | -181447 |
| average opponent: 1485record: 1-4-2 | new rating: 1447 | |||