Willemstein, Robert
Current rating: 1330
Record: 11-25
| Regional Championships Athens 2023 (pioneer) | starting rating: 1360 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 61 | Larsen, Christoffer (1997) | Lost 1-2 | -81352 |
| 2pioneer | 161 | S, Martin (1488) | Won 2-1 | +201372 |
| 3pioneer | 130 | Palma, Matteo (1502) | Lost 0-2 | -151357 |
| 4pioneer | 151 | Danesi, Alessandro (1817) | Lost 0-2 | -101347 |
| 5pioneer | 162 | Vukomanovic, Igor (1454) | Lost 1-2 | -171330 |
| top | average opponent: 1651record: 1-4 | new rating: 1330 | ||
| Grand Prix Utrecht 2019 (ELD limited) | starting rating: 1389 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 423 | Fuchs, Sven (1500) | Won 2-0 | +201409 |
| 2sealed | 376 | Zuckerman, Eyal (1420) | Lost 1-2 | -171392 |
| 3sealed | 511 | Van der Gucht, Robbert (1571) | Lost 0-2 | -151377 |
| 4sealed | 561 | Heijselaar, Justin (1423) | Lost 1-2 | -171360 |
| top | average opponent: 1478record: 1-3 | new rating: 1360 | ||
| Grand Prix Lille 2018 (GRN standard) | starting rating: 1366 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 41 | Minster, Jerome (1500) | Won 2-1 | +211387 |
| 3standard | 83 | Chan, Yu Pan Jacky (1848) | Lost 0-2 | -101377 |
| 4standard | 309 | Verheesen, Rene (1634) | Lost 1-2 | -141363 |
| 5standard | 411 | Taskinlar, Ramiz Rona (1426) | Won 2-1 | +191382 |
| 6standard | 351 | Masin, Nikolas (1473) | Won 2-1 | +201402 |
| 7standard | 246 | Lemke, Gero (1707) | Lost 0-2 | -131389 |
| top | average opponent: 1598record: 3-3 | new rating: 1389 | ||
| Grand Prix Brussels 2018 (M19 standard) | starting rating: 1390 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 180 | Leydet, Cedric (1433) | Won 2-1 | +191409 |
| 3standard | 115 | Krochmaluk, Alexi (1496) | Lost 0-2 | -161393 |
| 4standard | 256 | Kiesel, Kevin (1342) | Lost 0-2 | -191374 |
| 5standard | 397 | Schipstra, Arjan (1497) | Won 2-0 | +201394 |
| 6standard | 212 | Edwards, Brendan (1688) | Lost 1-2 | -131381 |
| 7standard | 306 | Phelippeau, David (1549) | Lost 0-2 | -151366 |
| top | average opponent: 1501record: 2-4 | new rating: 1366 | ||
| Grand Prix Metz 2017 (HOU limited) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 215 | Nicolas, Hirigoyen (1500) | Lost 0-2 | -171425 |
| 2sealed | 463 | Ando, Michal (1534) | Lost 0-2 | -161409 |
| 3sealed | 691 | Marcillac, Anthony (1367) | Lost 0-2 | -191390 |
| top | average opponent: 1467record: 0-3 | new rating: 1390 | ||
| Grand Prix Amsterdam 2017 (AKH standard) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 278 | Stellingwerf, Allard (1556) | Lost 1-2 | -171455 |
| 2standard | 313 | Doff, Rikjan (1461) | Lost 0-2 | -181437 |
| 3standard | 551 | Addario, Riccardo (1638) | Lost 1-2 | -141423 |
| 4standard | 535 | Somers, Roald (1435) | Won 2-0 | +181441 |
| 5standard | 476 | Gonzalez, Monica (1497) | Won 2-0 | +191460 |
| 6standard | 426 | Ledy, Jonathan (1453) | Lost 0-2 | -181442 |
| top | average opponent: 1507record: 2-4 | new rating: 1442 | ||
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 220 | Gustavsen, Magnus (1515) | Lost 1-2 | -181482 |
| 2standard | 424 | De Roo, Martin (1517) | Won 2-1 | +191501 |
| 3standard | 493 | Manfroid, Alexis (1499) | Won 2-0 | +181519 |
| 4standard | 390 | Pluymaekers, Twan (1526) | Lost 0-2 | -181501 |
| 5standard | 370 | Bundock, Johnathan (1536) | Lost 0-2 | -171484 |
| 6standard | 507 | Stok, Alex (1835) | Lost 1-2 | -121472 |
| top | average opponent: 1571record: 2-4 | new rating: 1472 | ||