Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1931 |
37 |
2463 | (45) | 26 |
| 1932 |
41 |
2452 | (49) | 0 |
| 1933 |
51 |
2441 | (45) | 5 |
| 1934 |
36 |
2467 | (36) | 40 |
| 1935 |
61 |
2432 | (36) | 19 |
| 1936 |
93 |
2403 | (34) | 37 |
| 1937 |
89 |
2408 | (42) | 0 |
| 1938 |
79 |
2412 | (34) | 54 |
| 1939 |
67 |
2423 | (50) | 0 |
| 1940 |
59 |
2434 | (58) | 0 |
| 1941 |
44 |
2444 | (61) | 0 |
| 1942 |
33 |
2455 | (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 |
| |
