Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
1006 |
2093 | (72) | 11 |
| 1929 |
997 |
2100 | (74) | 0 |
| 1930 |
1006 |
2108 | (75) | 0 |
| 1931 |
1038 |
2115 | (73) | 0 |
| 1932 |
1030 |
2122 | (69) | 0 |
| 1933 |
1010 |
2130 | (62) | 0 |
| 1934 |
991 |
2137 | (51) | 14 |
| 1935 |
687 |
2205 | (50) | 11 |
| 1936 |
645 |
2214 | (53) | 0 |
| 1937 |
592 |
2223 | (51) | 0 |
| 1938 |
546 |
2232 | (39) | 30 |
| 1939 |
707 |
2178 | (43) | 24 |
| 1940 |
636 |
2179 | (57) | 0 |
| 1941 |
603 |
2180 | (65) | 0 |
| 1942 |
549 |
2181 | (70) | 0 |
| 1943 |
526 |
2182 | (72) | 0 |
| 1944 |
508 |
2183 | (72) | 0 |
| 1945 |
532 |
2184 | (69) | 0 |
| 1946 |
508 |
2185 | (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 |
| |
