van Zwol, Koen
Current rating: 1431
Record: 4-8
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1353 | de Groof, Stein (1570) | Won 2-1 | +201483 |
| 2sealed | 1178 | Rossetti, Tommaso (1610) | Won 2-1 | +211504 |
| 3sealed | 1075 | Uliana, Damien (1484) | Lost 0-2 | -191485 |
| 4sealed | 1333 | Van Immerseel, Johan (1597) | Lost 0-2 | -161469 |
| 5sealed | 1293 | Bollinger, Isabelle (1413) | Lost 0-2 | -191450 |
| 6sealed | 1320 | Tunnard, Andrew (1361) | Lost 0-2 | -191431 |
| average opponent: 1506record: 2-4 | new rating: 1431 | |||
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 435 | Rots, Johan (1609) | Lost 0-2 | -161484 |
| 2standard | 425 | Bortoletto, Michael (1367) | Lost 0-2 | -201464 |
| 3standard | 687 | Vale, Louis (1463) | Lost 1-2 | -181446 |
| 4standard | 722 | Brzezicki, Adam (1448) | Won 2-0 | +181464 |
| 5standard | 627 | Augustin, Tony (1464) | Won 2-0 | +181482 |
| 6standard | 526 | Roberts, Adam (1453) | Lost 1-2 | -191463 |
| average opponent: 1467record: 2-4 | new rating: 1463 | |||