Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
972 |
2094 | (74) | 11 |
| 1929 |
960 |
2102 | (76) | 0 |
| 1930 |
960 |
2110 | (76) | 0 |
| 1931 |
1000 |
2118 | (74) | 0 |
| 1932 |
978 |
2126 | (69) | 0 |
| 1933 |
968 |
2133 | (62) | 0 |
| 1934 |
944 |
2141 | (51) | 14 |
| 1935 |
645 |
2212 | (50) | 11 |
| 1936 |
564 |
2227 | (54) | 0 |
| 1937 |
499 |
2242 | (51) | 0 |
| 1938 |
442 |
2256 | (41) | 30 |
| 1939 |
487 |
2230 | (47) | 13 |
| 1940 |
469 |
2225 | (59) | 0 |
| 1941 |
457 |
2221 | (67) | 0 |
| 1942 |
432 |
2217 | (71) | 0 |
| 1943 |
427 |
2213 | (73) | 0 |
| 1944 |
435 |
2208 | (72) | 0 |
| 1945 |
462 |
2204 | (69) | 0 |
| 1946 |
465 |
2200 | (63) | 14 |
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 |
| Di Felice, Chess Results, 1941-1946, page 294 |
| Gaige, Chess Personalia, page 477 |
| Gaige, Chess Tournament Crosstables IV, page 812 |
| |
