Mosterman, Friso
Current rating: 1540
Record: 5-3
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 553 | Koevoet, Michel (1467) | Won 2-1 | +171517 |
| 2sealed | 418 | Weber, Robert (1492) | Won 2-0 | +181535 |
| 3sealed | 443 | Theunis, Johan (1620) | Won 2-1 | +191554 |
| 4sealed | 403 | Sovago, Philipp (1569) | Lost 0-2 | -171537 |
| 5sealed | 493 | Venancio, Ricardo (1604) | Lost 0-2 | -171520 |
| 6sealed | 560 | Kilappa, Elina (1524) | Won 2-0 | +181538 |
| 7sealed | 467 | van der Mandele, Joost (1630) | Won 2-0 | +201558 |
| 8sealed | 440 | Berdou, Dennis (1559) | Lost 0-2 | -181540 |
| average opponent: 1558record: 5-3 | new rating: 1540 | |||