Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
905 |
2093 | (74) | 11 |
| 1929 |
901 |
2101 | (76) | 0 |
| 1930 |
909 |
2109 | (76) | 0 |
| 1931 |
921 |
2117 | (74) | 0 |
| 1932 |
895 |
2125 | (70) | 0 |
| 1933 |
888 |
2133 | (63) | 0 |
| 1934 |
863 |
2141 | (52) | 14 |
| 1935 |
607 |
2209 | (50) | 11 |
| 1936 |
529 |
2222 | (54) | 0 |
| 1937 |
477 |
2234 | (52) | 0 |
| 1938 |
416 |
2247 | (42) | 30 |
| 1939 |
437 |
2220 | (50) | 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 |
| |
