Mariusz Peczak
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Lodz-ch | ??/??/1996 | 1320 |  Poland |
Mariusz Peczak Repertoire with White pieces (most played)
| ECO | Opening | Games |
| A53 | Old Indian defence | 1 games |
| D85 | Gruenfeld, exchange variation | 1 games |
| E11 | Bogo-Indian defence | 1 games |
| D20 | Queen's gambit accepted | 1 games |
Mariusz Peczak Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| B11 | Caro-Kann, two knights, 3...Bg4 | 2 games |
| D42 | Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3 | 1 games |
| A48 | King's Indian, East Indian defence | 1 games |
| A45 | Queen's pawn game | 1 games |
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