Koster, Mark
Current rating: 1504
Record: 3-3
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Schroder, Michael [DNK] (1581) | Won 2-1 | +191519 |
| 2sealed | 16 | Garcia, Diego (1421) | Lost 1-2 | -191500 |
| 3sealed | 501 | de Vreede, Marc (1449) | Won 2-0 | +171517 |
| 4sealed | 338 | Marottoli, Antonio Maria (1517) | Won 2-1 | +181535 |
| 5sealed | 173 | Hauck, Christian (1901) | Lost 0-2 | -121523 |
| 6sealed | 242 | Ayala, Dorian (1484) | Lost 0-2 | -191504 |
| average opponent: 1559record: 3-3 | new rating: 1504 | |||