Guillermo Pfeiffer
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Liga Nacional Ajedrez | 08/09/2008 | 1772 | Argentina |
Most Played Openings as White
| ECO | Opening | Games |
| C55 | Two knights defence | 1 games |
| B30 | Sicilian defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C01 | French, exchange variation | 1 games |
| B07 | Pirc defence | 1 games |
| A66 | Benoni, pawn storm variation | 1 games |


Argentina