Jonkheer, Merijn
Current rating: 1485
Record: 5-6
| Grand Prix Barcelona 2006 (GPT limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Balague, Alejandro (1507) | Lost 0-0 | -181483 |
| 2sealed | 207 | Ruscalleda, Lluis (1466) | Won 2-0 | +181501 |
| 3sealed | 123 | Ponsot, Nicolas (1633) | Lost 1-2 | -161485 |
| 4sealed | 229 | Sanz, Marc (1498) | Won 2-0 | +181503 |
| 5sealed | 158 | Navarro, Cristian (1504) | Lost 0-2 | -181485 |
| average opponent: 1522record: 2-3 | new rating: 1485 | |||
| Grand Prix Eindhoven 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 287 | van der Mede, Matthijs (1469) | Lost 0-2 | -191481 |
| 2extended | 410 | Peerlings, Onno (1482) | Won 2-0 | +181499 |
| 3extended | 311 | Nikkelen, Hans (1499) | Lost 0-2 | -181481 |
| 4extended | 380 | Claes, Nick (1479) | Won 2-0 | +181499 |
| 5extended | 321 | Kroon, Renee (1498) | Won 2-1 | +181517 |
| 6extended | 208 | van Ravesteijn, Tom (1593) | Lost 1-2 | -161501 |
| average opponent: 1503record: 3-3 | new rating: 1501 | |||