Duchesne, Koen
Current rating: 1456
Record: 14-17-2
| Grand Prix Ghent 2012 (legacy) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 618 | Rasmussen, Tierry (1449) | Lost 0-2 | -181475 |
| 2legacy | 819 | Toston Amezaga, Inigo (1453) | Lost 1-2 | -191456 |
| top | average opponent: 1451record: 0-2 | new rating: 1456 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 686 | Van Nugteren, Bas (1500) | Lost 0-2 | -191533 |
| 2legacy | 849 | Balmas, Gary (1482) | Draw 1-1 | -11532 |
| 3legacy | 931 | Michiels, Mayk (1486) | Lost 0-2 | -191513 |
| 4legacy | 1029 | Vey, Alexander (1429) | Lost 1-2 | -201493 |
| top | average opponent: 1474record: 0-3-1 | new rating: 1493 | ||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 194 | Pilz, Stefan (1500) | Lost 0-2 | -201538 |
| 2sealed | 338 | Athanasulias, Philip (1379) | Won 2-0 | +161554 |
| 3sealed | 268 | Noer, Anders (1604) | Lost 1-2 | -171537 |
| 4sealed | 305 | Janssen, Matthias (1520) | Won 2-1 | +171554 |
| 5sealed | 226 | Zeitler, Daniel (1436) | Won 2-0 | +161570 |
| 6sealed | 212 | Lange, Robert (1546) | Lost 1-2 | -181552 |
| top | average opponent: 1497record: 3-3 | new rating: 1552 | ||
| Grand Prix Brussels 2010 (WWK standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 105 | Santinelli, Enrico (1489) | Draw 0-0 | 01482 |
| 2standard | 212 | Grun, Francois (1498) | Won 2-0 | +191501 |
| 3standard | 126 | Cardoso, Ricardo (1642) | Won 2-1 | +201521 |
| 4standard | 113 | Marti, Samuel (1638) | Lost 0-1 | -161505 |
| 5standard | 192 | Vilain, Arnaud (1713) | Won 2-0 | +221527 |
| 6standard | 125 | Hoydonckx, Yves (1548) | Won 2-0 | +181545 |
| 7standard | 79 | van Leeuwen, Arjan (1760) | Won 2-1 | +221567 |
| 8standard | 48 | Baltussen, Stijn (1619) | Won 2-0 | +191586 |
| 9standard | 28 | Bucourt, Thomas (1609) | Won 2-0 | +191605 |
| 10standard | 30 | Kocsis, Gabor (1646) | Won 2-1 | +181623 |
| 11standard | 17 | Godineau, Manuel (1828) | Lost 1-2 | -141609 |
| 12standard | 44 | Steinborn, Robin (1634) | Lost 0-2 | -181591 |
| 13standard | 62 | Timmins, Guillaume (1602) | Won 2-1 | +191610 |
| 14standard | 43 | Hagan, Jonathan (1687) | Lost 1-2 | -171593 |
| 15standard | 58 | Vd Wal, Alle M (1637) | Lost 1-2 | -171576 |
| 16standard | 69 | Rizzi, Mattia (1557) | Lost 1-2 | -181558 |
| top | average opponent: 1632record: 9-6-1 | new rating: 1558 | ||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 445 | Van Overbeek, Rene A (1481) | Lost 0-2 | -181482 |
| 2sealed | 592 | Filatriau, Franck (1465) | Lost 0-2 | -191463 |
| 3sealed | 662 | Roos, Maarten (1557) | Won 2-0 | +201483 |
| 4sealed | 636 | Gola, Matej M (1481) | Won 2-0 | +181501 |
| 5sealed | 588 | Van Hoeymissen, Wim (1454) | Lost 0-2 | -191482 |
| top | average opponent: 1488record: 2-3 | new rating: 1482 | ||