De Ridder, Sammy
Current rating: 1503
Record: 4-4
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1520 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 562 | Alvarez, Alfonso (1500) | Won 2-1 | +181538 |
| 2sealed | 536 | McGovern, Mark (1564) | Lost 0-2 | -171521 |
| 3sealed | 616 | Brueggemann, Julian (1549) | Lost 0-2 | -181503 |
| average opponent: 1538record: 1-2 | new rating: 1503 | |||
| Grand Prix Brussels 2004 (DST standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 164 | Kolaczek, Yohan (1500) | Won 2-1 | +181518 |
| 2standard | 7 | Girodroux, Pierre (1679) | Lost 1-2 | -151503 |
| 3standard | 255 | Skocek, Jean Philippe (1499) | Lost 1-2 | -181485 |
| 4standard | 296 | Muehlperger, Kolje (1482) | Won 2-1 | +181503 |
| 5standard | 180 | Di Camillo, Pierluigi (1483) | Won 2-1 | +171520 |
| average opponent: 1529record: 3-2 | new rating: 1520 | |||