R. Zweifel
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Bern op | 02/??/1996 | 1168 | Switzerland |
| Zuerich op2 | 12/??/1995 | 124 | Switzerland |
Most Played Openings as White
| ECO | Opening | Games |
| D87 | Gruenfeld, exchange, Spassky variation | 1 games |
| E14 | Queen's Indian, 4.e3 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B23 | Sicilian, closed | 1 games |
| B20 | Sicilian defence | 1 games |
| B50 | Sicilian | 1 games |


Switzerland