| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O Perez vs F Corrales Jimenez |
| 1-0 | 71 |
2005 |
40th Capablanca Memorial | B31 Sicilian, Rossolimo Variation |
| 2. O Perez vs Y Quesada Perez |
| 0-1 | 25 |
2005 |
40th Capablanca Memorial | B92 Sicilian, Najdorf, Opocensky Variation |
| 3. O Perez vs E Espinosa |
| 0-1 | 15 |
2007 |
Cuban Championship | C29 Vienna Gambit |
| 4. R Vera vs O Perez |
| 0-1 | 25 |
2007 |
Cuban Championship | D09 Queen's Gambit Declined, Albin Counter Gambit, 5.g3 |
| 5. O Perez vs Y Gonzalez Vidal |
| 0-1 | 33 |
2007 |
Cuban Championship | B10 Caro-Kann |
| 6. O Perez vs H Hernandez |
| ½-½ | 32 |
2007 |
Cuban Championship | B53 Sicilian |
| 7. L S Martinez Duany vs O Perez |
| 0-1 | 71 |
2007 |
Cuban Championship | B50 Sicilian |
| 8. O Perez vs H Blanco Ronquillo |
 | 1-0 | 25 |
2007 |
Cuban Championship | C86 Ruy Lopez, Worrall Attack |
| 9. O Perez vs O Almeida |
| ½-½ | 72 |
2007 |
Cuban Championship | B32 Sicilian |
| 10. M Gongora vs O Perez |
| ½-½ | 68 |
2007 |
Cuban Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 11. A Abreu vs O Perez |
| 1-0 | 72 |
2007 |
Cuban Championship | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 12. C Alonso Gonzalez vs O Perez |
| 0-1 | 34 |
2009 |
XXXII Open | B01 Scandinavian |
| 13. O Perez vs M Marin |
| 1-0 | 42 |
2011 |
XIII Open Internacional Sants | B07 Pirc |
| 14. O Perez vs A Kovalyov |
| 0-1 | 38 |
2011 |
XIII Open Internacional Sants | B90 Sicilian, Najdorf |
| 15. O Perez vs A Alvarez Pedraza |
| 0-1 | 35 |
2011 |
XIII Open Internacional Sants | C00 French Defense |
| 16. O Perez vs D Swiercz |
| 1-0 | 44 |
2011 |
XIII Open Internacional Sants | B90 Sicilian, Najdorf |
| 17. L Aroshidze vs O Perez |
| 1-0 | 61 |
2011 |
XIII Open Internacional Sants | C18 French, Winawer |
| 18. O Perez vs F Peralta |
| 0-1 | 26 |
2012 |
20th Montcada Open | B10 Caro-Kann |
| 19. E Fernandez Aguado vs O Perez |
| 0-1 | 42 |
2012 |
38th Sitges Open | A15 English |
| 20. S R Chowdhury vs O Perez |
| 0-1 | 37 |
2012 |
35th Barbera Open A | B53 Sicilian |
| 21. O Perez vs D Uribe Arteaga |
| 1-0 | 36 |
2012 |
38th Badalona Open A | B06 Robatsch |
| 22. O Perez vs S Del Rio Angelis |
| ½-½ | 34 |
2012 |
20th Montcada Open | B07 Pirc |
| 23. O Perez vs A Mhamal |
| 0-1 | 38 |
2012 |
35th Barbera Open A | C45 Scotch Game |
| 24. O Perez vs E Cordova |
| ½-½ | 75 |
2012 |
20th Montcada Open | B41 Sicilian, Kan |
| 25. O Perez vs C Rabineau |
| ½-½ | 50 |
2012 |
38th Sitges Open | B01 Scandinavian |