Mariusz 2 Szewczyk
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| XLI Ludwika Zamenhofa Mem | 12/27/2022 | 2300 |  Poland |
| Ustron Open A 2020 | 08/15/2020 | 2291 | Poland |
| European Blitz 2014 | 12/19/2014 | 2460 | Poland |
Mariusz 2 Szewczyk Repertoire with White pieces (most played)
| ECO | Opening | Games |
| B12 | Caro-Kann defence | 2 games |
| B51 | Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack | 2 games |
| B40 | Sicilian defence | 1 games |
| B30 | Sicilian defence | 1 games |
Mariusz 2 Szewczyk Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| C50 | King's pawn game | 1 games |
| E09 | Catalan, closed, main line | 1 games |
| E06 | Catalan, closed, 5.Nf3 | 1 games |
| A28 | English, four knights system | 1 games |
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