B. Duffek
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Prague Cedok op | ??/??/1996 | 850 |  Czech Republic |
Most Played Openings as White
| ECO | Opening | Games |
| E90 | King's Indian, 5.Nf3 | 1 games |
| D13 | Queen's Gambit Declined Slav, exchange variation | 1 games |
| E21 | Nimzo-Indian, three knights variation | 1 games |
| A51 | Budapest defence declined | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D13 | Queen's Gambit Declined Slav, exchange variation | 1 games |
| C64 | Ruy Lopez, classical (Cordel) defence | 1 games |
| C35 | King's Gambit Accepted, Cunningham defence | 1 games |
| D02 | Queen's pawn game | 1 games |
