Joern Biethahn
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Kiel op-B 16th | 07/26/2003 | 0 | Germany |
| Kiel op 14th | 08/18/2001 | 789 | Germany |
| Schleswig Holstein-ch 56th | ??/??/2001 | 1711 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| C11 | French defence | 3 games |
| B33 | Sicilian defence | 2 games |
| B34 | Sicilian, accelerated fianchetto, exchange variation | 2 games |
| B08 | Pirc, classical (two knights) system | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D00 | Queen's pawn game | 2 games |
| A29 | English, four knights, kingside fianchetto | 1 games |
| C47 | Four knights, Scotch variation | 1 games |
| C36 | King's Gambit Accepted, Abbazia defence (classical defence, modern defence[!]) | 1 games |


Germany