Lehallier, Guillaume
Current rating: 1409
Record: 4-9-2
| Grand Prix Birmingham 2008 (Lorwyn block) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 48 | Parker, Julian D (1500) | Lost 0-2 | -181460 |
| 2block | 198 | Hughes, Gareth (1482) | Draw 1-1 | +11461 |
| 3block | 209 | Guiret, Jean-francois (1482) | Won 2-0 | +181479 |
| 4block | 182 | Hemmingway-brown, Elijah (1501) | Lost 0-2 | -171462 |
| 5block | 212 | Marsden, Alex (1487) | Lost 0-2 | -181444 |
| 6block | 205 | Duignan, Thomas M (1482) | Draw 0-0 | +11445 |
| 7block | 180 | Marti, Patricia (1449) | Lost 1-2 | -181427 |
| 8block | 153 | De Loenen, Karolien (1446) | Lost 0-2 | -181409 |
| average opponent: 1479record: 1-5-2 | new rating: 1409 | |||
| Grand Prix Paris 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 80 | Boissenot, Alexandre (1500) | Lost 0-2 | -181482 |
| 2sealed | 346 | Silva, Antonio 1797 (1482) | Lost 0-2 | -181464 |
| 3sealed | 355 | Pinchon, Mathieu (1446) | Lost 1-2 | -181446 |
| 4sealed | 343 | Soules, Pierre (1446) | Won 2-0 | +181464 |
| 5sealed | 265 | Krebs, Mickael (1464) | Lost 1-2 | -181446 |
| 6sealed | 255 | Arrieta, Kepa (1384) | Won 2-0 | +171463 |
| 7sealed | 190 | Kelterbaum, Morgane (1317) | Won 2-1 | +151478 |
| average opponent: 1434record: 3-4 | new rating: 1478 | |||