Dieter Jonasson
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Troisdorf op | 11/02/2004 | 1638 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| D07 | Queen's Gambit Declined, Chigorin defence | 1 games |
| C55 | Two knights defence | 1 games |
| E91 | King's Indian, 6.Be2 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C33 | King's gambit accepted | 1 games |
| B21 | Sicilian, Grand Prix attack | 1 games |
| C41 | Philidor's defence | 1 games |
| A29 | English, four knights, kingside fianchetto | 1 games |


Germany