Guitton, Marc
Current rating: 1565
| Grand Prix Paris 2004 (COK limited) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 7 | Bellando, Jean-sebastian (1519) | Won 2-0 | +171605 |
| 3sealed | 7 | Xie, Xiu Jie (1521) | Draw 1-1 | -21603 |
| 4sealed | 87 | Norgaard, Lasse (1639) | Lost 0-2 | -171586 |
| 5sealed | 156 | Soons, Pieter (1520) | Lost 0-2 | -191567 |
| 6sealed | 192 | Netrefa, Jiri (1541) | Won 2-0 | +171584 |
| 7sealed | 135 | Matus, Karel (1519) | Lost 0-2 | -191565 |
| top | average opponent: 1543record: 2-3-1 | new rating: 1565 | ||
| Grand Prix Reims 2002 (extended) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 142 | casas pietrini, julio cesar (1597) | Won 2-0 | +191576 |
| 2extended | 52 | Vix, Regis (1517) | Won 2-1 | +171593 |
| 3extended | 79 | Benezech, Lionel (1571) | Lost 1-2 | -191574 |
| 4extended | 234 | Crugnola, Julien (1518) | Won 2-1 | +171591 |
| 5extended | 127 | Fiebelkorn, Sven (1496) | Lost 0-2 | -201571 |
| 6extended | 171 | Cattaneo, Gabriele (1570) | Lost 0-2 | -181553 |
| 7extended | 221 | Verdy, Fabian (1502) | Won 2-1 | +171570 |
| 8extended | 156 | Jacquet, Lois (1543) | Won 2-0 | +181588 |
| top | average opponent: 1539record: 5-3 | new rating: 1588 | ||
| Grand Prix Antwerp 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 176 | Nilsson, Johan (1462) | Won 2-0 | +171517 |
| 2sealed | 83 | Luyckx, Klaas (1518) | Draw 1-1 | 01517 |
| 3sealed | 95 | Smink, Robert (1557) | Lost 0-2 | -171500 |
| 4sealed | 180 | Wessels, Frank (1599) | Won 2-0 | +201520 |
| 5sealed | 122 | Roelandt, Stephane (1517) | Won 2-0 | +181538 |
| 6sealed | 73 | Eigner, Nikolaus (1581) | Lost 1-2 | -171521 |
| 7sealed | 106 | Alink, Daniel (1520) | Won 2-0 | +181539 |
| 8sealed | 77 | Purcha, Stephane (1556) | Won 2-0 | +181557 |
| top | average opponent: 1539record: 5-2-1 | new rating: 1557 | ||