Lucas Efron
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Buenos Aires Najdorf U08/10 | 10/07/2004 | 0 | Argentina |
Most Played Openings as White
| ECO | Opening | Games |
| C44 | King's pawn game | 2 games |
| C00 | French defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A46 | Queen's pawn game | 1 games |
| A00 | Polish (Sokolsky) opening | 1 games |
| C50 | King's pawn game | 1 games |
| C48 | Four knights, Spanish variation | 1 games |


Argentina