J. Petrtyl
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| CZE-chT1a 9697 | ??/??/1996 | 861 |  Czech Republic |
| CZE-chT 8788 | ??/??/1988 | 415 |
Most Played Openings as White
| ECO | Opening | Games |
| B51 | Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack | 1 games |
| B07 | Pirc defence | 1 games |
| B02 | Alekhine's defence | 1 games |
| B93 | Sicilian, Najdorf, 6.f4 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A34 | English, symmetrical variation | 1 games |
| C15 | French, Winawer (Nimzovich) variation | 1 games |
| A57 | Benko gambit | 1 games |
| C18 | French, Winawer, advance variation | 1 games |
