Male
FIDE ID:
Mariusz Pecak
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| POL-chT 2nd div North | ??/??/1999 | 1658 |  Poland |
| Lodz-ch | ??/??/1997 | 1469 | Poland |
Most Played Openings as White
| ECO | Opening | Games |
| D31 | Queen's Gambit Declined, 3.Nc3 | 2 games |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 1 games |
| E20 | Nimzo-Indian defence | 1 games |
| D02 | Queen's pawn game | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B17 | Caro-Kann, Steinitz variation | 1 games |
| D12 | Queen's Gambit Declined Slav, 4.e3 Bf5 | 1 games |
| E61 | King's Indian defence, 3.Nc3 | 1 games |
| B23 | Sicilian, closed | 1 games |
