Oosterbaan, Brenn
Current rating: 1501
| Grand Prix Lyon 2010 (ROE limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 171 | Brugiere, Yann (1500) | Won 2-0 | +181519 |
| 2sealed | 20 | Cassini, Gregory (1579) | Lost 1-2 | -171502 |
| 3sealed | 211 | Deutschmann, Thierry (1297) | Won 2-1 | +141516 |
| 4sealed | 190 | Sajgalik, Eduardo (1663) | Lost 1-2 | -151501 |
| 5sealed | 216 | Panebianco, Andrea (1491) | Won 2-0 | +181519 |
| 6sealed | 169 | Benis, Pierre (1513) | Lost 1-2 | -181501 |
| top | average opponent: 1507record: 3-3 | new rating: 1501 | ||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 502 | Cheung, Kim (1500) | Lost 0-2 | -181482 |
| 2sealed | 583 | Coline, Mickael (1466) | Won 2-1 | +181500 |
| 3sealed | 581 | Desmet, Thomas (1500) | Lost 0-2 | -181482 |
| 4sealed | 664 | Bombeeck, Inge (1482) | Won 2-0 | +181500 |
| 5sealed | 579 | Mass, Martyn (1499) | Won 2-1 | +181518 |
| 6sealed | 511 | Bronsgeest, Bas (1583) | Lost 0-2 | -171501 |
| top | average opponent: 1505record: 3-3 | new rating: 1501 | ||
| Grand Prix Eindhoven 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 67 | van de Heiden, Paul (1500) | Won 2-1 | +181518 |
| 2extended | 4 | Vlasman, Edwin (1520) | Won 2-0 | +181536 |
| 3extended | 33 | Behring, Jurgen (1536) | Lost 0-2 | -181518 |
| 4extended | 249 | Heijmans, Remke (1524) | Won 2-1 | +181536 |
| 5extended | 117 | Leuschner, Knut (1519) | Lost 1-2 | -181518 |
| 6extended | 170 | Kasumov, Arif (1525) | Lost 0-2 | -181500 |
| top | average opponent: 1521record: 3-3 | new rating: 1500 | ||