Udo Marienfeld
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Dortmund op1 | 03/06/2006 | 1550 |  Germany |
| Dortmund op | 01/19/2006 | 1471 | Germany |
| Dortmund-ch | 02/28/2005 | 1622 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| B86 | Sicilian, Sozin attack | 2 games |
| A00 | Polish (Sokolsky) opening | 2 games |
| B01 | Scandinavian (centre counter) defence | 1 games |
| B04 | Alekhine's defence, modern variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B50 | Sicilian | 2 games |
| D02 | Queen's pawn game | 1 games |
| B40 | Sicilian defence | 1 games |
| C02 | French, advance variation | 1 games |
