Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1935 |
989 |
2120 | (50) | 13 |
| 1936 |
875 |
2133 | (42) | 27 |
| 1937 |
908 |
2112 | (48) | 11 |
| 1938 |
895 |
2106 | (58) | 0 |
| 1939 |
781 |
2100 | (64) | 0 |
| 1940 |
611 |
2095 | (66) | 0 |
| 1941 |
528 |
2089 | (64) | 11 |
Rating table notes
|
| Biographical data |
| Name: Koska, Josef |
| Born: 1 July 1910 |
| Died: |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1931-1935, page 278 |
| Di Felice, Chess Results, 1936-1940, page 361 |
| Di Felice, Chess Results, 1941-1946, page 347 |
| Gaige, Chess Personalia, page 224 |
| |
