Ratings
| Year |
Rank |
Edo |
Dev. |
Games |
| 1931 |
36 |
2471 | (45) | 26 |
| 1932 |
41 |
2460 | (49) | 0 |
| 1933 |
47 |
2449 | (45) | 5 |
| 1934 |
36 |
2475 | (36) | 40 |
| 1935 |
60 |
2440 | (36) | 19 |
| 1936 |
89 |
2410 | (33) | 37 |
| 1937 |
87 |
2415 | (42) | 0 |
| 1938 |
76 |
2419 | (34) | 54 |
| 1939 |
65 |
2430 | (50) | 0 |
| 1940 |
57 |
2441 | (58) | 0 |
| 1941 |
43 |
2451 | (61) | 0 |
| 1942 |
30 |
2462 | (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 |
| |
