Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1931 |
37 |
2465 | (44) | 26 |
| 1932 |
46 |
2450 | (47) | 0 |
| 1933 |
60 |
2434 | (41) | 16 |
| 1934 |
40 |
2468 | (35) | 40 |
| 1935 |
61 |
2438 | (35) | 19 |
| 1936 |
90 |
2410 | (33) | 37 |
| 1937 |
87 |
2416 | (41) | 0 |
| 1938 |
76 |
2421 | (34) | 54 |
| 1939 |
64 |
2432 | (50) | 0 |
| 1940 |
56 |
2443 | (58) | 0 |
| 1941 |
40 |
2455 | (61) | 0 |
| 1942 |
30 |
2466 | (60) | 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 |
| |
