Karczewski, Marcin
Current rating: 1458
Record: 19-23-2
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 283 | Ciombolini, Philip (1520) | Won 2-0 | +191477 |
| 2standard | 240 | Dahlquist, Niklas (1647) | Lost 1-2 | -151462 |
| 3standard | 337 | Tetera, Filip (1512) | Lost 1-2 | -171445 |
| 4standard | 533 | Candelu, Yuri (1510) | Won 2-1 | +201465 |
| 5standard | 374 | Kiskis, Saulius (1549) | Lost 0-2 | -171448 |
| 6standard | 496 | Ruiz, Miguel (1440) | Won 2-0 | +181466 |
| 7standard | 371 | Vallejo, Raul (1508) | Won 2-1 | +191485 |
| 8standard | 305 | Hugony, Francesco (2029) | Lost 0-2 | -91476 |
| 9standard | 288 | Langer, Christian (1487) | Lost 1-2 | -181458 |
| top | average opponent: 1578record: 4-5 | new rating: 1458 | ||
| Grand Prix Warsaw 2016 (KLD standard) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 131 | Michalowski, Michal (1500) | Won 2-0 | +191512 |
| 2standard | 219 | Majkowski, Konrad (1517) | Won 2-1 | +181530 |
| 3standard | 25 | Kruger, Philipp (1534) | Lost 1-2 | -181512 |
| 4standard | 211 | Miceika, Tadas (1521) | Lost 1-2 | -181494 |
| 5standard | 303 | Szpac, Andrzej (1562) | Lost 0-2 | -171477 |
| 6standard | 387 | Malatesta, Marco (1484) | Lost 0-2 | -181459 |
| 7standard | 427 | Hammarstrom, Teodor (1407) | Won 2-0 | +171476 |
| 8standard | 358 | Polok, Przemyslaw (1469) | Draw 1-1 | 01476 |
| 9standard | 340 | Zielinski, Mateusz (1482) | Lost 0-2 | -181458 |
| top | average opponent: 1497record: 3-5-1 | new rating: 1458 | ||
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 65 | Bedrava, Jan (1500) | Won 2-0 | +181530 |
| 2standard | 38 | Sikora, Mateusz (1771) | Draw 1-1 | +41534 |
| 3standard | 50 | Guizzi, Christophe (1518) | Lost 1-2 | -181516 |
| 4standard | 399 | Kolarski, Piotr (1503) | Won 2-1 | +181534 |
| 5standard | 284 | Katra, Marcin (1518) | Lost 0-2 | -181516 |
| 6standard | 377 | Hansen, Ronnie (1447) | Won 2-1 | +161532 |
| 7standard | 278 | Kandlhofer, Josef Rain (1395) | Lost 0-1 | -201512 |
| 8standard | 68 | Minchev, Zdravko (1492) | Lost 0-2 | -191493 |
| top | average opponent: 1518record: 3-4-1 | new rating: 1493 | ||
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 8 | Karlo, Edvardas (1500) | Won 2-0 | +181507 |
| 2sealed | 5 | Hammarlund Corselli, Michael (1618) | Lost 0-2 | -161491 |
| 3sealed | 302 | Larsson, Daniel (1540) | Won 2-0 | +191510 |
| 4sealed | 139 | Buczkowski, Sylwester (1503) | Won 2-1 | +181528 |
| 5sealed | 167 | Ludvi, Taavi (1605) | Lost 1-2 | -171511 |
| 6sealed | 175 | Bouchery, Aymeric (1422) | Lost 0-2 | -201491 |
| 7sealed | 257 | Vecera, Jiri (1477) | Won 0-0 | +181509 |
| 8sealed | 195 | Moses, Asher (1531) | Won 2-0 | +181527 |
| 9sealed | 140 | Verhulst, Johan (1684) | Lost 1-2 | -151512 |
| top | average opponent: 1542record: 5-4 | new rating: 1512 | ||
| Grand Prix Warsaw 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 69 | Schlosser, Philipp (1500) | Won 2-0 | +181518 |
| 2standard | 23 | Grabowski, Bastian (1551) | Won 2-1 | +191537 |
| 3standard | 26 | Bylica, Lukasz (1533) | Won 2-0 | +181555 |
| 4standard | 149 | Velazquez, Jose Luis (1678) | Lost 0-2 | -161539 |
| 5standard | 132 | Notting, Wander (1646) | Lost 0-2 | -161523 |
| 6standard | 251 | Andrys, Piotr (1624) | Lost 0-2 | -161507 |
| 7standard | 293 | Philippou, Alexander (1529) | Lost 0-2 | -181489 |
| 8standard | 307 | Lazarevas, Lukas (1468) | Lost 1-2 | -181471 |
| 9standard | 311 | Kjeldgaard, Nick (1466) | Won 2-0 | +181489 |
| top | average opponent: 1555record: 4-5 | new rating: 1489 | ||