Guido Tonna
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Italy op | ??/??/1991 | 368 |  Italy |
| Imperia op | ??/??/1989 | 712 | Italy |
| Celle Ligure op | ??/??/1989 | 566 | Italy |
| Venice tt | ??/??/1983 | 503 | Italy |
Most Played Openings as White
| ECO | Opening | Games |
| A33 | English, symmetrical variation | 1 games |
| D38 | Queen's Gambit Declined, Ragozin variation | 1 games |
| E94 | King's Indian, orthodox variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A44 | Old Benoni defence | 3 games |
| B30 | Sicilian defence | 1 games |
| A39 | English, symmetrical, main line with d4 | 1 games |
| B23 | Sicilian, closed | 1 games |
