Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1931 |
37 |
2462 | (45) | 26 |
| 1932 |
41 |
2451 | (49) | 0 |
| 1933 |
54 |
2439 | (46) | 5 |
| 1934 |
37 |
2465 | (36) | 40 |
| 1935 |
64 |
2431 | (36) | 19 |
| 1936 |
93 |
2402 | (34) | 37 |
| 1937 |
90 |
2407 | (42) | 0 |
| 1938 |
79 |
2411 | (34) | 54 |
| 1939 |
66 |
2422 | (51) | 0 |
| 1940 |
57 |
2433 | (59) | 0 |
| 1941 |
45 |
2443 | (62) | 0 |
| 1942 |
34 |
2454 | (61) | 14 |
Rating table notes
|
| Biographical data |
| Name: Mazel, Isaak Yakovlevich |
| Also known as: Isaak Maisel |
| Born: 1911 |
| Died: 1943 |
|
| |
| References |
| Books |
| Di Felice, Chess Results, 1931-1935, page 394 |
| Di Felice, Chess Results, 1936-1940, page 364 |
| Di Felice, Chess Results, 1941-1946, page 49 |
| Gaige, Chess Personalia, page 274 |
| Soltis, Soviet Chess, page 139, 144 |
| |
