Stefan Kettenburg
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Prague op-A | 01/11/2007 | 1965 | Czech Republic |
| Berlin tt | 10/05/2006 | 1906 | Germany |
| Berlin op 04 | 04/14/2006 | 1854 | Germany |
| Pardubice op-A | 07/22/2005 | 2335 | Czech Republic |
Most Played Openings as White
| ECO | Opening | Games |
| A85 | Dutch with c4 & Nc3 | 3 games |
| D13 | Queen's Gambit Declined Slav, exchange variation | 3 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 2 games |
| E10 | Queen's pawn game | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D02 | Queen's pawn game | 4 games |
| B13 | Caro-Kann, exchange variation | 4 games |
| D36 | Queen's Gambit Declined, exchange, positional line, 6.Qc2 | 2 games |
| B12 | Caro-Kann defence | 2 games |


Czech Republic
Germany