Pietrzak, Maurycy
Current rating: 1580
Record: 15-14
| Regional Championships Naples 2023 (ONE standard) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 9 | Corona, Luigi (1542) | Won 2-1 | +181565 |
| 2standard | 21 | Gotfredsen, Anders (1789) | Lost 0-2 | -141551 |
| 3standard | 169 | Ascione, Feliciano (1507) | Lost 1-2 | -191532 |
| 4standard | 173 | Dei Lazzaretti, Marco (1548) | Won 2-1 | +191551 |
| 5standard | 144 | Depraz, Jean-Emmanuel (2094) | Lost 0-2 | -91542 |
| 6standard | 135 | Korosis, Dimitris (1455) | Won 2-0 | +161558 |
| 7standard | 141 | Rossi, Claudio (1642) | Won 2-1 | +201578 |
| 8standard | 101 | De Wit, Wiebe (1505) | Lost 0-2 | -201558 |
| 9standard | 33 | Benincasa, Giuliano (1767) | Won 2-0 | +221580 |
| top | average opponent: 1650record: 5-4 | new rating: 1580 | ||
| Regional Championships Sofia 2022 (pioneer) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 35 | Picciafuochi, Riccardo (1750) | Lost 1-2 | -151546 |
| 2pioneer | 111 | Cehulic, Andrej (1544) | Won 2-1 | +181564 |
| 3pioneer | 112 | Wiener, Peter (1514) | Lost 1-2 | -191545 |
| 4pioneer | 136 | Fernandez, Marcos Jose (1741) | Lost 1-2 | -141531 |
| 5pioneer | 150 | Can Gecer, Ege (1463) | Lost 0-2 | -201511 |
| 6pioneer | 168 | Senneca, Marco (1440) | Won 2-1 | +171528 |
| 7pioneer | 143 | Abt, Robin (1601) | Won 2-1 | +191547 |
| top | average opponent: 1579record: 3-4 | new rating: 1547 | ||
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 204 | Nuijten, Julien (1747) | Won 2-0 | +221522 |
| 4sealed | 181 | Chia, Evan En Yao (1527) | Won 2-0 | +191541 |
| 5sealed | 65 | Messow, Philip (1841) | Lost 0-2 | -131528 |
| 6sealed | 65 | Rabyska, Ondrej (1616) | Lost 1-2 | -171511 |
| 7sealed | 350 | Rumplmayr, Christopher (1497) | Won 2-1 | +181529 |
| 8sealed | 215 | Guan, Thomas Zhennan (1434) | Won 2-0 | +161545 |
| 9sealed | 156 | Guluk, Ayk (1650) | Won 2-0 | +201565 |
| 10draft | 336 | Eliatamby, Charles (1758) | Lost 1-2 | -141551 |
| 11draft | 215 | Bujanowicz, Pawel (1872) | Won 2-0 | +231574 |
| 12draft | 293 | Dezani, Jeremy (2238) | Lost 0-2 | -71567 |
| 13draft | 295 | Law, Tom (1722) | Won 2-1 | +211588 |
| 14draft | 264 | Bevere, Gianluca (1813) | Lost 0-2 | -141574 |
| 15draft | 289 | Zorzi, Giulio (1837) | Lost 0-2 | -131561 |
| top | average opponent: 1735record: 7-6 | new rating: 1561 | ||