Guillermo Pierdant Gonzalez
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| MEX-ch U20 | ??/??/2001 | 480 |  Mexico |
| MEX-ch U18 | ??/??/1999 | 89 | Mexico |
| Carlos Torre mem op 11th | 12/??/1998 | 1020 | Mexico |
| Wch U12 | ??/??/1995 | 402 | Mexico |
Most Played Openings as White
| ECO | Opening | Games |
| B78 | Sicilian, dragon, Yugoslav attack, 10.O-O-O | 2 games |
| B33 | Sicilian defence | 1 games |
| B28 | Sicilian, O'Kelly variation | 1 games |
| B76 | Sicilian, dragon, Yugoslav attack, 7...O-O | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B89 | Sicilian, Sozin, 7.Be3 | 1 games |
| B52 | Sicilian, Canal-Sokolsky attack, 3...Bd7 | 1 games |
| B67 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7 | 1 games |
| E85 | King's Indian, Saemisch, orthodox variation | 1 games |
