Claassen, Stefan
Current rating: 1367
Record: 5-14
| Grand Prix Brussels 2018 (M19 standard) | starting rating: 1385 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 14 | Vassallo, Luke (1711) | Won 2-1 | +241409 |
| 2standard | 135 | Kohler, Tim (1709) | Lost 0-2 | -131396 |
| 3standard | 433 | Devilliez, Cyril (1470) | Lost 1-2 | -171379 |
| 4standard | 470 | Drapala, Thomas (1718) | Lost 0-2 | -121367 |
| top | average opponent: 1652record: 1-3 | new rating: 1367 | ||
| Grand Prix Metz 2017 (HOU limited) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 302 | Calvo De Lara, Miguel (1514) | Won 2-1 | +191436 |
| 2sealed | 220 | Becker, Felix (1521) | Lost 0-2 | -161420 |
| 3sealed | 448 | Fransen, Bart [BEL] (1414) | Lost 0-2 | -181402 |
| 4sealed | 542 | Bellemin, Damien (1454) | Lost 1-2 | -171385 |
| top | average opponent: 1476record: 1-3 | new rating: 1385 | ||
| Grand Prix Amsterdam 2017 (AKH standard) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 273 | Hagen, Marcel (1450) | Won 2-0 | +181465 |
| 2standard | 162 | Verbeken, Dirk (1690) | Lost 0-2 | -141451 |
| 3standard | 481 | Toth, Ferenc (1361) | Lost 1-2 | -191432 |
| 4standard | 501 | Guerra Diaz, Victor (1604) | Lost 0-2 | -151417 |
| top | average opponent: 1526record: 1-3 | new rating: 1417 | ||
| Grand Prix London 2016 (KLD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 658 | Mehta, Alexander (1431) | Won 2-1 | +171517 |
| 2sealed | 358 | Dubelaar, Corne (1531) | Lost 0-2 | -181499 |
| 3sealed | 825 | Hadfield, Christian (1484) | Won 2-0 | +181517 |
| 4sealed | 703 | Vu, Jeremy (1566) | Lost 1-2 | -171500 |
| 5sealed | 644 | Bullack, Malte (1500) | Lost 1-2 | -181482 |
| 6sealed | 876 | Baptiste, Nicolas (1573) | Lost 0-2 | -171465 |
| 7sealed | 838 | Zuna, Pavel (1454) | Lost 1-2 | -181447 |
| top | average opponent: 1505record: 2-5 | new rating: 1447 | ||