Vertefeuille, John
Current rating: 1526
Record: 8-7-1
| Grand Prix New Jersey 2004 (Mirrodin block) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 78 | Shi, Lugan (1518) | Won 2-1 | +191483 |
| 3block | 56 | Postlethwait, William (1454) | Lost 1-2 | -191464 |
| 4block | 297 | Seres, Alex (1502) | Won 2-0 | +191483 |
| 5block | 154 | Ahmed, Adam (1536) | Won 2-1 | +191502 |
| 6block | 38 | Shvartsman, Alex (1744) | Lost 1-2 | -141488 |
| 7block | 140 | Goodman, Ben (1505) | Won 2-1 | +191507 |
| 8block | 134 | Koven, Robert (1525) | Draw 1-1 | 01507 |
| 9block | 95 | Beckage, Justin (1562) | Won 2-0 | +191526 |
| average opponent: 1543record: 5-2-1 | new rating: 1526 | |||
| Grand Prix Atlanta 2003 (8ED standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 139 | Givens, Jeff (1500) | Lost 1-2 | -181482 |
| 2standard | 162 | Savant, Mark (1482) | Lost 0-2 | -181464 |
| 3standard | 222 | Young, Wesley (1464) | Won 2-0 | +181482 |
| 4standard | 230 | Landry, Lyle (1482) | Lost 0-2 | -181464 |
| 5standard | 207 | Whitehorn, Jayson (1464) | Won 2-0 | +181482 |
| 6standard | 170 | Bonham, Bryson (1480) | Won 2-1 | +181500 |
| 7standard | 120 | Burden, Michael E (1499) | Lost 0-2 | -181482 |
| 8standard | 101 | Salter, Sean (1482) | Lost 1-2 | -181464 |
| average opponent: 1482record: 3-5 | new rating: 1464 | |||