Mstislav Efimov
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Vladimir op-B | 09/??/2004 | 625 | Russian Federation |
Most Played Openings as White
| ECO | Opening | Games |
| A00 | Polish (Sokolsky) opening | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B24 | Sicilian, closed | 1 games |
| B50 | Sicilian | 1 games |


Russian Federation