Otto Zimmermann
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Zuerich Seniors | ??/??/1962 | 0 | Switzerland |
| SUI Cup | ??/??/1955 | 0 | Switzerland |
| SUI-Saarland | 09/??/1955 | 0 | Switzerland |
| Zuerich | ??/??/1954 | 0 | Switzerland |
Most Played Openings as White
| ECO | Opening | Games |
| D51 | Queen's Gambit Declined, 4.Bg5 Nbd7 | 3 games |
| A13 | English opening | 2 games |
| A52 | Budapest defence | 2 games |
| C84 | Ruy Lopez, closed defence | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B07 | Pirc defence | 2 games |
| B01 | Scandinavian (centre counter) defence | 2 games |
| A47 | Queen's Indian defence | 2 games |
| C02 | French, advance variation | 2 games |


Switzerland