Marcin Sek
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| POL-ch U10 | ??/??/2001 | 0 | Poland |
Most Played Openings as White
| ECO | Opening | Games |
| C54 | Giuoco Piano | 1 games |
| D30 | Queen's gambit declined | 1 games |
| C77 | Ruy Lopez, Morphy defence | 1 games |
| C47 | Four knights, Scotch variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C50 | King's pawn game | 2 games |
| C22 | Centre game | 1 games |
| C47 | Four knights, Scotch variation | 1 games |
| C30 | King's gambit | 1 games |


Poland