Maszer, Michal
Current rating: 1475
Record: 11-13
| Grand Prix Brussels 2020 (pioneer) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 88 | Migueis Alem, Paulo Rafael (1517) | Lost 0-2 | -181493 |
| 2pioneer | 538 | Bourges, Aymeric (1448) | Lost 0-2 | -191474 |
| 3pioneer | 806 | Braun, Jean-Baptiste (1529) | Won 2-0 | +191493 |
| 4pioneer | 575 | Deppenbroek, Bram (1488) | Lost 0-2 | -181475 |
| top | average opponent: 1496record: 1-3 | new rating: 1475 | ||
| Grand Prix Krakow 2019 (M20 limited) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 309 | Alieksieiev, Andrii (1721) | Lost 0-2 | -151525 |
| 2sealed | 511 | Levy, Olivier (1844) | Lost 0-2 | -121513 |
| 3sealed | 479 | Kirillov, Mikhail (1464) | Won 2-1 | +171530 |
| 4sealed | 326 | Cofek, Vito (1483) | Lost 0-2 | -191511 |
| top | average opponent: 1628record: 1-3 | new rating: 1511 | ||
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 462 | Bielsa, David (1568) | Lost 0-2 | -171508 |
| 2sealed | 620 | Schubert, Mario (1417) | Won 2-0 | +171525 |
| 3sealed | 576 | Moller, Jonathan (1513) | Lost 0-2 | -191506 |
| 4sealed | 761 | Besancon, Herve (1483) | Lost 0-2 | -181488 |
| 5sealed | 742 | Odijk, Martijn (1415) | Won 2-1 | +171505 |
| 6sealed | 668 | Cabella, Andrea (1466) | Won 2-1 | +171522 |
| 7sealed | 422 | Castillo Torrente, Ignacio (1509) | Won 2-1 | +181540 |
| top | average opponent: 1482record: 4-3 | new rating: 1540 | ||
| Grand Prix Milan 2011 (ISD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 728 | Mangione, Vincenzo (1504) | Lost 0-2 | -181482 |
| 2sealed | 849 | Pommier, Emmanuel (1493) | Lost 1-2 | -181464 |
| 3sealed | 844 | Vivan, Ludovico (1463) | Won 2-0 | +181482 |
| 4sealed | 871 | Krug, Sebastian (1482) | Lost 1-2 | -181464 |
| 5sealed | 847 | Espejo Fernandez, Angel (1397) | Won 2-0 | +171481 |
| 6sealed | 793 | Strubelj, Gregor (1554) | Lost 1-2 | -171464 |
| 7sealed | 767 | Fonne, Nicolas (1472) | Won 2-0 | +191483 |
| 8sealed | 699 | Dominguez, Javier (1703) | Won 2-0 | +211504 |
| 9sealed | 642 | Bastos, Frederico (1669) | Won 2-1 | +211525 |
| top | average opponent: 1526record: 5-4 | new rating: 1525 | ||