Yesid Mauricio Isaza Pierotti
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Internet Section 11B g/8'+2 | 03/11/2004 | 916 | Spain |
| Internet Section 08B g/8'+2 | 03/08/2004 | 864 | Spain |
| Internet Section 07B g/8'+2 | 03/07/2004 | 803 | Spain |
| Pan American-ch U16 | 06/07/2003 | 519 | Colombia |
Most Played Openings as White
| ECO | Opening | Games |
| B70 | Sicilian, dragon variation | 2 games |
| C63 | Ruy Lopez, Schliemann defence | 2 games |
| B01 | Scandinavian (centre counter) defence | 2 games |
| C45 | Scotch game | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B43 | Sicilian, Kan, 5.Nc3 | 6 games |
| B47 | Sicilian, Taimanov (Bastrikov) variation | 2 games |
| B41 | Sicilian, Kan variation | 2 games |
| C27 | Vienna game | 1 games |


Spain
Colombia