Otto Mak
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Sao Paulo op | ??/??/1972 | 0 |  Brazil |
| Sao Paulo TNA | 07/??/1967 | 0 | Brazil |
Most Played Openings as White
| ECO | Opening | Games |
| E64 | King's Indian, fianchetto, Yugoslav system | 2 games |
| E72 | King's Indian with e4 & g3 | 1 games |
| D11 | Queen's Gambit Declined Slav, 3.Nf3 | 1 games |
| A83 | Dutch, Staunton gambit, Staunton's line | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C02 | French, advance variation | 1 games |
| B08 | Pirc, classical (two knights) system | 1 games |
| B07 | Pirc defence | 1 games |
| B09 | Pirc, Austrian attack | 1 games |
