Koopmans, Jelmer
Current rating: 1638
Record: 20-13-2
| Grand Prix Utrecht 2019 (ELD limited) | starting rating: 1661 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 563 | Nicosia, Alvaro (1746) | Won 2-1 | +191680 |
| 2sealed | 490 | Spiri, Matteo Giuseppe (1613) | Won 2-0 | +171697 |
| 3sealed | 275 | Tsvetkov, Vladislav (1516) | Lost 0-2 | -211676 |
| 4sealed | 239 | Schmidt, Mirko (1660) | Lost 1-2 | -191657 |
| 5sealed | 506 | Wiederkehr, Thomas (1597) | Lost 0-2 | -191638 |
| top | average opponent: 1626record: 2-3 | new rating: 1638 | ||
| Grand Prix Birmingham 2017 (modern) | starting rating: 1619 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 379 | Verniers, Simon (1463) | Won 2-0 | +151634 |
| 2modern | 339 | White, Paul [ENG] (1605) | Won 0-0 | +171651 |
| 3modern | 217 | Bosch, Jeffrey (1521) | Won 2-1 | +161667 |
| 4modern | 192 | Metsa, Roope (1617) | Lost 0-2 | -191648 |
| 5modern | 297 | Morrissey, Liam (1560) | Won 2-0 | +161664 |
| 6modern | 116 | Urena, Abraham (1706) | Won 2-1 | +191683 |
| 7modern | 29 | Campina, Filipe (1497) | Won 2-1 | +151698 |
| 8modern | 40 | Boussaud, Eliott (1843) | Lost 1-2 | -161682 |
| 9modern | 66 | Novak, Sascha (1551) | Lost 1-2 | -201662 |
| 10modern | 160 | Tildesley, Matthew (1586) | Lost 0-2 | -191643 |
| 11modern | 197 | Miles, George (1649) | Won 2-0 | +181661 |
| 12modern | 154 | Guan, Thomas Zhennan (1666) | Won 2-0 | +181679 |
| 13modern | 160 | D'Orazio, Pietro (1674) | Lost 1-2 | -181661 |
| top | average opponent: 1610record: 8-5 | new rating: 1661 | ||
| Grand Prix Lille 2016 (modern) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 105 | Erlmann, Michael (1540) | Won 2-1 | +191505 |
| 2modern | 248 | Wilde, Sebastian (1605) | Won 2-1 | +201525 |
| 3modern | 9 | Marchand, Benjamin (1535) | Lost 0-2 | -181507 |
| 4modern | 510 | Horvat, Vjeran (2036) | Won 2-1 | +271534 |
| 5modern | 317 | Maurer, Tobias (1734) | Won 2-1 | +211555 |
| 6modern | 186 | Ruel, Olivier (1900) | Lost 0-2 | -121543 |
| 7modern | 292 | Leclercq, Gauthier (1503) | Won 2-0 | +181561 |
| 8modern | 127 | Spurk, Sebastian (1560) | Won 2-0 | +181579 |
| 9modern | 128 | Gillet, Aurelien (1764) | Won 2-0 | +211600 |
| 10modern | 102 | Pages Vidal, Marc (1598) | Lost 0-2 | -181582 |
| 11modern | 81 | Yang, Xiaoliang (1660) | Draw 1-1 | +11583 |
| 12modern | 134 | Huber, Andreas (1451) | Draw 1-1 | -21581 |
| 13modern | 168 | Kostadinov, Dimitre (1584) | Won 2-1 | +181599 |
| 14modern | 125 | Collinet, Patrick (1681) | Won 2-1 | +201619 |
| 15modern | 90 | Ruhl, Alexander (1610) | ID | 01619 |
| top | average opponent: 1651record: 9-3-3 | new rating: 1619 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2102 | Hurink, Maarten (1573) | Lost 1-2 | -171483 |
| 2sealed | 2289 | Aas, Andreas (1447) | Won 2-0 | +181501 |
| 3sealed | 2220 | Arndt, Georg (1683) | Lost 0-2 | -151486 |
| top | average opponent: 1568record: 1-2 | new rating: 1486 | ||