de Best, Mark
Current rating: 1465
Record: 9-12-1
| Grand Prix Brussels 2015 (BFZ standard) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Sellers, Dennis (1500) | Lost 0-0 | -181472 |
| 2standard | 553 | Wudarski, Jakub (1512) | Won 0-0 | +191491 |
| 3standard | 785 | Gruson, Pierre (1698) | Won 2-0 | +211512 |
| 4standard | 423 | Calf, David (1596) | Lost 0-2 | -161496 |
| 5standard | 546 | Duparcq, Guy (1657) | Lost 0-2 | -151481 |
| 6standard | 606 | Spataro, Luca (1596) | Lost 1-2 | -161465 |
| top | average opponent: 1593record: 2-4 | new rating: 1465 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1528 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2048 | Eleveld, Laurens (1500) | Draw 1-1 | -11527 |
| 2sealed | 2236 | Valendzik, Malte (1503) | Lost 0-2 | -181509 |
| 3sealed | 2398 | Rau, Michael (1445) | Lost 0-2 | -191490 |
| top | average opponent: 1483record: 0-2-1 | new rating: 1490 | ||
| Grand Prix Paris 2015 (DTK standard) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 181 | Dubus, Franck (1713) | Lost 0-2 | -151525 |
| 4standard | 313 | Komly, Clement (1553) | Won 2-0 | +181543 |
| 5standard | 251 | Spranger, Lukas (1498) | Lost 0-2 | -191524 |
| 6standard | 399 | Canard, Robin (1518) | Won 2-1 | +181542 |
| 7standard | 277 | Anceschi, Marco (1741) | Lost 0-2 | -141528 |
| top | average opponent: 1605record: 2-3 | new rating: 1528 | ||
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 188 | Verdoodt, Philip (1599) | Lost 1-2 | -161484 |
| 2standard | 518 | Binder, Patrick (1438) | Won 2-0 | +171501 |
| 3standard | 448 | Soubrier, Stephane (1622) | Won 2-0 | +201521 |
| 4standard | 441 | Faas, Willeke (1518) | Won 2-1 | +181539 |
| 5standard | 202 | McLeod, Lewis (1580) | Lost 0-2 | -171522 |
| 6standard | 212 | van Donzel, Jaap (1518) | Won 2-1 | +181540 |
| 7standard | 150 | Mons, Stephan (1537) | Won 2-1 | +181558 |
| 8standard | 176 | Homeister, Patrick (1552) | Lost 0-2 | -181540 |
| top | average opponent: 1546record: 5-3 | new rating: 1540 | ||