Marc Siewert
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Norderstedt op 5th | 03/27/2005 | 1746 | Germany |
| Hamburg State-ch U16 | 03/12/2005 | 1499 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A00 | Polish (Sokolsky) opening | 2 games |
| B76 | Sicilian, dragon, Yugoslav attack, 7...O-O | 1 games |
| B07 | Pirc defence | 1 games |
| C52 | Evans gambit | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A00 | Polish (Sokolsky) opening | 3 games |
| C42 | Petrov's defence | 2 games |
| C50 | King's pawn game | 2 games |


Germany