Z. Tretina
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Moravia-ch | ??/??/1997 | 1978 | Czech Republic |
| Ostrava op | ??/??/1997 | 1028 | Czech Republic |
Most Played Openings as White
| ECO | Opening | Games |
| B72 | Sicilian, dragon, 6.Be3 | 1 games |
| C70 | Ruy Lopez | 1 games |
| B04 | Alekhine's defence, modern variation | 1 games |
| C18 | French, Winawer, advance variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B54 | Sicilian | 1 games |
| B95 | Sicilian, Najdorf, 6...e6 | 1 games |
| D31 | Queen's Gambit Declined, 3.Nc3 | 1 games |
| B20 | Sicilian defence | 1 games |


Czech Republic