| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Goetgeluck vs J Diaz |
| ½-½ | 33 | 1966 | Orebro Stud olm fB | E24 Nimzo-Indian, Samisch |
| 2. J Diaz vs R End |
| 1-0 | 43 | 1966 | Orebro Stud olm fB | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 3. J Fridjonsson vs J Diaz |
| ½-½ | 38 | 1966 | Orebro Stud olm fB | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 4. J Diaz vs H Illi |
| ½-½ | 26 | 1966 | Orebro Stud olm fB | C26 Vienna |
| 5. B Dueno vs J Diaz |
| 1-0 | 31 | 1966 | Orebro Stud olm fB | B44 Sicilian |
| 6. Letelier vs J Diaz |
| ½-½ | 41 | 1968 | Pan American Championship | B25 Sicilian, Closed |
| 7. F Castillo Tamariz vs J Diaz |
| ½-½ | 36 | 1968 | Pan American Championship | E91 King's Indian |
| 8. J Diaz vs E Jimenez Zerquera |
| ½-½ | 14 | 1968 | Pan American Championship | C68 Ruy Lopez, Exchange |
| 9. J Diaz vs E Cobo Arteaga |
| 0-1 | 59 | 1968 | Pan American Championship | E11 Bogo-Indian Defense |
| 10. J Diaz vs H Rossetto |
| ½-½ | 43 | 1968 | Pan American Championship | D10 Queen's Gambit Declined Slav |
| 11. J Diaz vs W Estrada Degrandi |
| ½-½ | 21 | 1968 | Pan American Championship | D15 Queen's Gambit Declined Slav |
| 12. J L Alvarez del Monte vs J Diaz |
| 0-1 | 44 | 1968 | Pan American Championship | A07 King's Indian Attack |
| 13. O Yepez Obando vs J Diaz |
| 1-0 | 23 | 1968 | Pan American Championship | E94 King's Indian, Orthodox |
| 14. W Ader Hausman vs J Diaz |
| 1-0 | 25 | 1968 | Pan American Championship | B06 Robatsch |
| 15. J Diaz vs F J Perez |
| 1-0 | 34 | 1968 | Pan American Championship | C62 Ruy Lopez, Old Steinitz Defense |
| 16. J Diaz vs S Garcia Martinez |
| ½-½ | 27 | 1968 | Pan American Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 17. J R Martinez vs J Diaz |
| ½-½ | 14 | 1968 | Pan American Championship | A46 Queen's Pawn Game |
| 18. J Diaz vs E Macskasy |
| 0-1 | 36 | 1968 | Pan American Championship | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 19. I Mendivil vs J Diaz |
| 0-1 | 41 | 1968 | Pan American Championship | B32 Sicilian |
| 20. A Morales vs J Diaz |
| 0-1 | 41 | 1968 | Pan American Championship | B32 Sicilian |
| 21. J Diaz vs G Pena |
| 1-0 | 29 | 1968 | Pan American Championship | A20 English |
| 22. J Boudy Bueno vs J Diaz |
| ½-½ | 12 | 1968 | Pan American Championship | C70 Ruy Lopez |
| 23. L Zinn vs J Diaz |
| ½-½ | 53 | 1968 | Capablanca Memorial | C41 Philidor Defense |
| 24. J Diaz vs O'Kelly |
| ½-½ | 42 | 1968 | Capablanca Memorial | B40 Sicilian |
| 25. Suetin vs J Diaz |
| 1-0 | 42 | 1968 | Capablanca Memorial | E71 King's Indian, Makagonov System (5.h3) |
Kibitzing
