Cosson, Pierre
Current rating: 1517
Record: 6-5
| Grand Prix Lyon 2003 (MRD limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 54 | Tschering, Thomas (1518) | Lost 1-2 | -181500 |
| 3sealed | 338 | Madoumier, Julien (1500) | Won 2-1 | +181518 |
| 4sealed | 240 | Garceries, Jeremie (1519) | Won 2-0 | +181536 |
| 5sealed | 91 | Peray, Thomas (1524) | Lost 1-2 | -191517 |
| average opponent: 1515record: 2-2 | new rating: 1517 | |||
| Grand Prix Tours 1999 (MMQ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 93 | Thevenon, Sandy (1500) | Won 2-0 | +181518 |
| 2sealed | 67 | Defay, Cedric (1506) | Lost 1-2 | -181500 |
| 3sealed | 101 | Nielsen, Michael (1483) | Lost 0-2 | -191481 |
| 4sealed | 215 | Auberger, Christophe (1482) | Won 2-0 | +181499 |
| 5sealed | 102 | Oswald, Etienne (1500) | Won 2-0 | +191518 |
| 6sealed | 60 | Mellaerts, Damien (1518) | Won 2-0 | +181536 |
| 7sealed | 48 | Norres, Albert (1536) | Lost 0-2 | -181518 |
| average opponent: 1504record: 4-3 | new rating: 1518 | |||