Siegfried Jonas
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| SBRhH-ch H | ??/??/2001 | 143 | Germany |
| Rheinhessen-ch HT1 | ??/??/2000 | 222 | Germany |
| Worms RH-op | ??/??/1995 | 0 | Germany |
| RH-op | ??/??/1993 | 35 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| C57 | Two knights defence | 3 games |
| D55 | Queen's Gambit Declined, 6.Nf3 | 2 games |
| A56 | Benoni defence | 1 games |
| D94 | Gruenfeld, 5.e3 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D60 | Queen's Gambit Declined, Orthodox defence | 3 games |
| C02 | French, advance variation | 2 games |
| C00 | French defence | 1 games |
| B21 | Sicilian, Grand Prix attack | 1 games |


Germany