Koornneef, Kenny
Current rating: 1626
Record: 23-15
| Grand Prix Metz 2017 (HOU limited) | starting rating: 1659 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 387 | Schmittlin, Baptiste (1518) | Won 2-0 | +151674 |
| 2sealed | 284 | Spurio, Stefano (1669) | Lost 1-2 | -181656 |
| 3sealed | 520 | Daubasse, Ludovic (1526) | Won 2-0 | +161672 |
| 4sealed | 317 | Murray, Alex (1486) | Won 2-0 | +151687 |
| 5sealed | 247 | Chauvel, Laurent (1454) | Lost 0-2 | -231664 |
| 6sealed | 230 | Brocsko, Arthur (1645) | Lost 1-2 | -181646 |
| 7sealed | 359 | Volze, Felix (1522) | Lost 0-2 | -201626 |
| top | average opponent: 1546record: 3-4 | new rating: 1626 | ||
| Grand Prix Lisbon 2012 (RTR limited) | starting rating: 1590 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 12 | Guedj, Thomas (1758) | Lost 0-2 | -151575 |
| 2sealed | 248 | Silva, Rui (1430) | Won 2-1 | +151590 |
| 3sealed | 183 | Van Den Heuvel, Peter (1500) | Won 2-0 | +171607 |
| 4sealed | 139 | Oliveira, Samuel (1517) | Won 2-1 | +161623 |
| 5sealed | 76 | Canavesi, Daniele (1849) | Won 2-0 | +221645 |
| 6sealed | 81 | Francisco, Pedro (1540) | Won 2-0 | +161661 |
| 7sealed | 46 | Canfarotta, Simone (1562) | Won 2-1 | +161677 |
| 8sealed | 31 | Mira Anzola, Eduardo (1578) | Lost 0-2 | -191658 |
| 9sealed | 59 | Breit, Bernhard (1786) | Won 2-1 | +201678 |
| 10draft | 39 | Costa, Joao Miguel (1527) | Won 2-1 | +151693 |
| 11draft | 55 | Lucena, Daniel (1688) | Won 2-0 | +181711 |
| 12draft | 45 | Soumet, Arnaud (1709) | Lost 1-2 | -181693 |
| 13draft | 20 | de Goeijen, Gijs (1717) | Lost 0-2 | -171676 |
| 14draft | 11 | Dictus, Mark (1753) | Lost 0-2 | -171659 |
| top | average opponent: 1637record: 9-5 | new rating: 1659 | ||
| Grand Prix Madrid 2012 (DKA limited) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 705 | Bamberger, Mark (1534) | Won 2-0 | +181579 |
| 3sealed | 617 | Escribano, David (1505) | Lost 1-2 | -201559 |
| 4sealed | 792 | Ortega Redondo, Oscar (1508) | Lost 0-2 | -191540 |
| 5sealed | 817 | Esser, Florian (1475) | Lost 1-2 | -191521 |
| 6sealed | 835 | Klein, Kora (1485) | Won 2-1 | +171538 |
| 7sealed | 769 | Campbell, Gary (1404) | Won 2-1 | +161554 |
| 8sealed | 752 | Adams, Olaf (1580) | Won 2-1 | +181572 |
| 9sealed | 706 | Bednarik, Richard (1545) | Won 2-1 | +181590 |
| top | average opponent: 1505record: 5-3 | new rating: 1590 | ||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Gobeli, Thomas (1500) | Won 2-1 | +181518 |
| 2sealed | 107 | Baltussen, Stijn (1515) | Lost 1-2 | -181500 |
| 3sealed | 111 | Hulkenberg, Jasper (1444) | Won 2-0 | +171517 |
| 4sealed | 146 | De Schryver, Jessica (1491) | Won 2-0 | +171534 |
| 5sealed | 69 | Dornstauder, Sebastian (1493) | Won 2-1 | +181552 |
| 6sealed | 61 | Spruyt, Braam (1518) | Won 2-0 | +171569 |
| 7sealed | 32 | Rosenberger, Alexander (1656) | Lost 0-2 | -161553 |
| 8sealed | 36 | Willems, Sjoerd (1737) | Won 2-1 | +211574 |
| 9sealed | 51 | Jensen, David (1858) | Lost 0-2 | -131561 |
| top | average opponent: 1579record: 6-3 | new rating: 1561 | ||