van de Akker, Wum
Current rating: 1470
Record: 6-8
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 476 | Senel, Akin (1370) | Won 2-1 | +161480 |
| 2standard | 175 | Brunet, Max (1431) | Won 2-1 | +171497 |
| 3standard | 258 | Lippmann, Robert (1609) | Lost 1-2 | -161481 |
| 4standard | 291 | Boerma, Arjan (1521) | Won 2-1 | +191500 |
| 5standard | 135 | Maugard, Antoine (1683) | Lost 0-2 | -151485 |
| 6standard | 282 | Van Rooij, Peter (1336) | Won 2-0 | +161501 |
| 7standard | 270 | Idelfonso, Diony (1600) | Lost 1-2 | -171484 |
| 8standard | 230 | Cattrysse, Sabbe (1665) | Lost 0-2 | -141470 |
| average opponent: 1527record: 4-4 | new rating: 1470 | |||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 26 | Slawski, Martin (1461) | Lost 0-2 | -191481 |
| 2legacy | 377 | Verbiest, Matthijs (1484) | Won 2-0 | +181499 |
| 3legacy | 148 | Luthander, Marcus (1482) | Lost 0-2 | -181481 |
| 4legacy | 363 | Lucas, Mark (1484) | Won 2-1 | +181499 |
| 5legacy | 229 | Mulders, Peter (1503) | Lost 0-2 | -181481 |
| 6legacy | 312 | Barkman, Maxim (1520) | Lost 0-2 | -171464 |
| average opponent: 1489record: 2-4 | new rating: 1464 | |||