Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
915 |
2086 | (74) | 11 |
| 1929 |
909 |
2092 | (76) | 0 |
| 1930 |
927 |
2099 | (76) | 0 |
| 1931 |
951 |
2105 | (75) | 0 |
| 1932 |
919 |
2111 | (71) | 0 |
| 1933 |
917 |
2117 | (64) | 0 |
| 1934 |
903 |
2123 | (54) | 14 |
| 1935 |
695 |
2183 | (54) | 11 |
| 1936 |
673 |
2178 | (62) | 0 |
| 1937 |
640 |
2173 | (66) | 0 |
| 1938 |
622 |
2168 | (67) | 0 |
| 1939 |
526 |
2163 | (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 |
| |
