Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1920 |
377 |
1995 | (122) | 7 |
Rating table notes
|
| Biographical data |
| Name: Zimmerman, Otto |
| Born: 11 Sep. 1892 |
| Died: 24 July 1979 |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1901-1920, page 274 |
| Gaige, Chess Personalia, page 479 |
| Thulin, Name index to CTC, page 306 |
| |
