Wittebol, Joey
Current rating: 1487
| Grand Prix Lille 2016 (modern) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 21 | Valcke, Michiel (1488) | Lost 1-2 | -191487 |
| 3modern | 569 | Croxo, Ewald (1596) | Won 2-0 | +201507 |
| 4modern | 410 | Ortiz Ros, Cristian (1449) | Lost 0-2 | -191488 |
| 5modern | 450 | Tonkin, Mathew (1474) | Won 2-0 | +181506 |
| 6modern | 522 | Ruppenthal, Bastian (1497) | Won 2-0 | +181524 |
| 7modern | 210 | Marchand, Benjamin (1539) | Lost 1-2 | -181506 |
| 8modern | 340 | De Canck, Sander (1426) | Lost 0-2 | -191487 |
| top | average opponent: 1496record: 3-4 | new rating: 1487 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 272 | Bruinsma, Jelmer (1518) | Won 2-1 | +181535 |
| 3sealed | 271 | Jacobsson, Albin (1606) | Lost 1-2 | -171518 |
| 4sealed | 220 | Nouhaili, Badr (1467) | Won 2-1 | +171535 |
| 5sealed | 241 | Tuduri, Ricard (1699) | Lost 0-2 | -151520 |
| 6sealed | 270 | Kaufmann, Michael (1702) | Lost 0-2 | -141506 |
| top | average opponent: 1598record: 2-3 | new rating: 1506 | ||
| Grand Prix Antwerp 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 218 | Kluytmans, Wilko (1477) | Won 2-0 | +181518 |
| 2modern | 330 | ketelaar, john (1518) | Won 2-1 | +181536 |
| 3modern | 279 | Hadrys, Piotr (1548) | Lost 1-2 | -181518 |
| 4modern | 263 | Van Uffelen, Bart (1467) | Won 2-0 | +171535 |
| 5modern | 217 | de Groot, Bjorn (1572) | Lost 1-2 | -171518 |
| 6modern | 472 | Bott, Sebastian (1501) | Lost 1-2 | -191499 |
| 7modern | 417 | Schwankl, Andre (1478) | Won 2-0 | +181517 |
| top | average opponent: 1509record: 4-3 | new rating: 1517 | ||