Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
915 |
2083 | (74) | 11 |
| 1929 |
907 |
2089 | (76) | 0 |
| 1930 |
930 |
2095 | (76) | 0 |
| 1931 |
951 |
2101 | (75) | 0 |
| 1932 |
923 |
2107 | (71) | 0 |
| 1933 |
919 |
2113 | (64) | 0 |
| 1934 |
916 |
2119 | (54) | 14 |
| 1935 |
700 |
2179 | (54) | 11 |
| 1936 |
674 |
2174 | (62) | 0 |
| 1937 |
643 |
2169 | (66) | 0 |
| 1938 |
621 |
2164 | (67) | 0 |
| 1939 |
527 |
2159 | (65) | 13 |
Rating table notes
|
| Biographical data |
| Name: Zefirov, Sergey Sergeevich |
| Born: 1905 |
| Died: 1955 |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1921-1930, page 211 |
| Di Felice, Chess Results, 1931-1935, page 410 |
| Di Felice, Chess Results, 1936-1940, page 379 |
| Gaige, Chess Personalia, page 477 |
| Gaige, Chess Tournament Crosstables IV, page 812 |
| |
