Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1928 |
1024 |
2097 | (72) | 11 |
| 1929 |
1009 |
2105 | (74) | 0 |
| 1930 |
1005 |
2112 | (75) | 0 |
| 1931 |
1042 |
2120 | (73) | 0 |
| 1932 |
1021 |
2127 | (69) | 0 |
| 1933 |
1007 |
2135 | (62) | 0 |
| 1934 |
984 |
2143 | (51) | 14 |
| 1935 |
675 |
2211 | (50) | 11 |
| 1936 |
624 |
2220 | (53) | 0 |
| 1937 |
575 |
2230 | (50) | 0 |
| 1938 |
533 |
2239 | (39) | 30 |
| 1939 |
694 |
2186 | (43) | 24 |
| 1940 |
622 |
2187 | (57) | 0 |
| 1941 |
595 |
2188 | (65) | 0 |
| 1942 |
551 |
2190 | (70) | 0 |
| 1943 |
536 |
2191 | (72) | 0 |
| 1944 |
526 |
2192 | (71) | 0 |
| 1945 |
543 |
2193 | (69) | 0 |
| 1946 |
541 |
2195 | (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 |
| |
