Sergey Mazenko
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| RUS-chT U18 | ??/??/2002 | 775 | Russian Federation |
Most Played Openings as White
| ECO | Opening | Games |
| C07 | French, Tarrasch, open variation | 1 games |
| C10 | French, Paulsen variation | 1 games |
| B13 | Caro-Kann, exchange variation | 1 games |
| B36 | Sicilian, accelerated fianchetto, Maroczy bind | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B30 | Sicilian defence | 2 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 2 games |


Russian Federation