Marcus Mairena
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| USA-chT Amateur East | 02/17/2007 | 665 |  United States |
| USA-chT Amateur East | 03/19/2005 | 768 | United States |
| USA-chT Amateur East | 02/15/2003 | 630 | United States |
| USA-chT Amateur East | ??/??/1998 | 953 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| B01 | Scandinavian (centre counter) defence | 1 games |
| B57 | Sicilian, Sozin, not Scheveningen | 1 games |
| B80 | Sicilian, Scheveningen variation | 1 games |
| C87 | Ruy Lopez, closed, Averbach variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C51 | Evans gambit declined | 1 games |
