| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O Zambrana vs A Neiksans |
| 0-1 | 73 |
2001 |
WJun | B43 Sicilian, Kan, 5.Nc3 |
| 2. O Zambrana vs T Bakre |
| ½-½ | 42 |
2001 |
WJun | B57 Sicilian |
| 3. O Zambrana vs Kotronias |
 | 0-1 | 28 |
2002 |
Bled Olympiad | B43 Sicilian, Kan, 5.Nc3 |
| 4. O Zambrana vs Daniel Mieles |
| 1-0 | 35 |
2003 |
Torneo Continental Americano | B33 Sicilian |
| 5. O Zambrana vs F Olivencia |
| 1-0 | 31 |
2003 |
7th Itau Cup | B89 Sicilian |
| 6. O Zambrana vs I Morovic |
| 0-1 | 32 |
2003 |
Torneo Continental Americano | B57 Sicilian |
| 7. O Zambrana vs Granda-Zuniga |
| ½-½ | 32 |
2003 |
zt 2.4 | B90 Sicilian, Najdorf |
| 8. O Zambrana vs Z Franco-Ocampos |
| 0-1 | 49 |
2003 |
Torneo Continental Americano | B57 Sicilian |
| 9. O Zambrana vs S Dumont |
| 1-0 | 39 |
2003 |
7th Itau Cup | B44 Sicilian |
| 10. O Zambrana vs C Velasquez |
| 1-0 | 19 |
2004 |
Copa ENTEL | B86 Sicilian, Fischer-Sozin Attack |
| 11. O Zambrana vs A Rodriguez |
| ½-½ | 21 |
2004 |
I Torneo Iberoamericano (Grupo-A) | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 12. O Zambrana vs E Arancibia |
| 1-0 | 33 |
2004 |
Copa ENTEL | B41 Sicilian, Kan |
| 13. O Zambrana vs R Cifuentes-Parada |
| ½-½ | 26 |
2004 |
I Torneo Iberoamericano (Grupo-A) | B57 Sicilian |
| 14. O Zambrana vs M Leon Hoyos |
| ½-½ | 42 |
2004 |
Moncada Cup 2nd | B32 Sicilian |
| 15. O Zambrana vs R Vasquez |
| ½-½ | 19 |
2004 |
Copa ENTEL | B33 Sicilian |
| 16. O Zambrana vs V Nevednichy |
| 0-1 | 29 |
2004 |
36th Olympiad | B57 Sicilian |
| 17. O Zambrana vs R Hernandez |
| 1-0 | 25 |
2004 |
Capablanca Memorial PREMIER II | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 18. O Zambrana vs R Vasquez |
| 0-1 | 57 |
2005 |
II Copa ENTEL | B90 Sicilian, Najdorf |
| 19. O Zambrana vs R Vasquez |
| 0-1 | 64 |
2005 |
American Continental Championship | B63 Sicilian, Richter-Rauzer Attack |
| 20. O Zambrana vs J Hellsten |
| 0-1 | 44 |
2005 |
II Copa ENTEL | B41 Sicilian, Kan |
| 21. O Zambrana vs D Flores |
| 0-1 | 48 |
2005 |
American Continental Championship | B41 Sicilian, Kan |
| 22. O Zambrana vs M Llorens |
| 1-0 | 41 |
2005 |
II Copa ENTEL | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 23. O Zambrana vs R Saladen |
| 1-0 | 34 |
2005 |
American Continental Championship | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 24. O Zambrana vs C Michel Yunis |
| 1-0 | 69 |
2005 |
II Copa ENTEL | B57 Sicilian |
| 25. O Zambrana vs G Milos |
| 0-1 | 39 |
2005 |
American Continental Championship | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |