Guillermo Cornejo Perales
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Lima Univ San Marcos 2nd | 03/29/2007 | 1047 | Peru |
| South America-ch U20 | 02/22/2006 | 1197 | Argentina |
| Pan American-ch U18 | 06/11/2005 | 1562 | Brazil |
| Lima op | 03/18/2005 | 966 | Peru |
Most Played Openings as White
| ECO | Opening | Games |
| B85 | Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc6 | 3 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 3 games |
| B50 | Sicilian | 2 games |
| B09 | Pirc, Austrian attack | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B78 | Sicilian, dragon, Yugoslav attack, 10.O-O-O | 5 games |
| B71 | Sicilian, dragon, Levenfish variation | 3 games |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 2 games |
| E94 | King's Indian, orthodox variation | 2 games |


Peru
Argentina
Brazil