Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1927 |
44 |
2417 | (62) | 22 |
Rating table notes
|
| Biographical data |
| Name: Ruben, Karl |
| Born: 4 Aug. 1903 |
| Died: 28 Oct. 1938 |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1921-1930, page 336 |
| Gaige, Chess Personalia, page 364 |
| Thulin, Name index to CTC, page 226 |
| |
