Oldrich Jonas
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Olomouc op | 08/??/1998 | 418 | Czech Republic |
| Zlin op | ??/??/1996 | 1900 | Czech Republic |
| Stary Smokovec op | ??/??/1996 | 805 | Slovakia |
| Moravia-ch op | ??/??/1994 | 492 | Czech Republic |
Most Played Openings as White
| ECO | Opening | Games |
| D11 | Queen's Gambit Declined Slav, 3.Nf3 | 2 games |
| E01 | Catalan, closed | 1 games |
| E69 | King's Indian, fianchetto, classical main line | 1 games |
| A25 | English, Sicilian reversed | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B90 | Sicilian, Najdorf | 2 games |
| A45 | Queen's pawn game | 1 games |
| B32 | Sicilian defence | 1 games |
| E10 | Queen's pawn game | 1 games |
Czech Republic
FIDE ID:

Slovakia