Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
911 |
2093 | (74) | 11 |
| 1929 |
904 |
2101 | (76) | 0 |
| 1930 |
919 |
2109 | (76) | 0 |
| 1931 |
936 |
2117 | (74) | 0 |
| 1932 |
909 |
2124 | (70) | 0 |
| 1933 |
907 |
2132 | (63) | 0 |
| 1934 |
881 |
2140 | (52) | 14 |
| 1935 |
608 |
2209 | (50) | 11 |
| 1936 |
537 |
2223 | (54) | 0 |
| 1937 |
476 |
2236 | (52) | 0 |
| 1938 |
423 |
2250 | (42) | 30 |
| 1939 |
454 |
2224 | (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 |
| |
