Isaak Mazel
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Trade Unions | ??/??/1938 | 0 | |
| URS-ch sf | ??/??/1938 | 0 | |
| Trade Unions | ??/??/1936 | 0 |
Most Played Openings as White
| ECO | Opening | Games |
| A27 | English, three knights system | 3 games |
| C01 | French, exchange variation | 2 games |
| D11 | Queen's Gambit Declined Slav, 3.Nf3 | 2 games |
| A13 | English opening | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C10 | French, Paulsen variation | 4 games |
| E23 | Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6 | 3 games |
| E11 | Bogo-Indian defence | 2 games |
| A85 | Dutch with c4 & Nc3 | 2 games |


