| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. I Mendivil vs I Bilek |
| 0-1 | 54 | 1960 | Leipzig Olympiad qual-3 | D94 Grunfeld |
| 2. L Barden vs I Mendivil |
| 1-0 | 42 | 1960 | Leipzig Olympiad qual-3 | D37 Queen's Gambit Declined |
| 3. I Mendivil vs J Kozma |
| 0-1 | 32 | 1960 | Leipzig Olympiad qual-3 | E97 King's Indian |
| 4. O Magnusson vs I Mendivil |
| 1-0 | 63 | 1960 | Leipzig Olympiad qual-3 | E94 King's Indian, Orthodox |
| 5. I Mendivil vs K Mohsen |
| 0-1 | 43 | 1960 | Leipzig Olympiad qual-3 | D51 Queen's Gambit Declined |
| 6. C Papapostolou vs I Mendivil |
| 0-1 | 64 | 1960 | Leipzig Olympiad qual-3 | B21 Sicilian, 2.f4 and 2.d4 |
| 7. I Mendivil vs G Chalkhaasuren |
| 0-1 | 30 | 1960 | Leipzig Olympiad qual-3 | E21 Nimzo-Indian, Three Knights |
| 8. Z Nilsson vs I Mendivil |
| 1-0 | 37 | 1960 | Leipzig Olympiad qual-3 | B62 Sicilian, Richter-Rauzer |
| 9. I Mendivil vs K Blom |
 | 0-1 | 30 | 1960 | Leipzig Olympiad qual-3 | A85 Dutch, with c4 & Nc3 |
| 10. C Papapostolou vs I Mendivil |
 | 1-0 | 40 | 1960 | Leipzig Olympiad Final-C | B30 Sicilian |
| 11. I Mendivil vs A Franck |
| ½-½ | 40 | 1960 | Leipzig Olympiad Final-C | A84 Dutch |
| 12. Perrottey vs I Mendivil |
| ½-½ | 74 | 1960 | Leipzig Olympiad Final-C | B20 Sicilian |
| 13. I Mendivil vs V Bergraser |
| 0-1 | 41 | 1960 | Leipzig Olympiad Final-C | D37 Queen's Gambit Declined |
| 14. A Galeb vs I Mendivil |
| 1-0 | 30 | 1960 | Leipzig Olympiad Final-C | D37 Queen's Gambit Declined |
| 15. I Mendivil vs A Magrin |
| ½-½ | 21 | 1960 | Leipzig Olympiad Final-C | E24 Nimzo-Indian, Samisch |
| 16. Myagmarsuren vs I Mendivil |
| 1-0 | 56 | 1960 | Leipzig Olympiad Final-C | B53 Sicilian |
| 17. A Baswedan vs I Mendivil |
| 1-0 | 25 | 1960 | Leipzig Olympiad Final-C | E94 King's Indian, Orthodox |
| 18. I Mendivil vs R Camara |
| 0-1 | 56 | 1963 | Fortaleza Zonal | B71 Sicilian, Dragon, Levenfish Variation |
| 19. L de Campelo Gentil vs I Mendivil |
| 1-0 | 40 | 1963 | Fortaleza Zonal | E76 King's Indian, Four Pawns Attack |
| 20. I Mendivil vs C Espinoza Rivasplata |
| 1-0 | 27 | 1963 | Fortaleza Zonal | E70 King's Indian |
| 21. I Mendivil vs A Foguelman |
| 0-1 | 23 | 1963 | Fortaleza Zonal | B10 Caro-Kann |
| 22. O Quinones Carrillo vs I Mendivil |
| ½-½ | 54 | 1963 | Fortaleza Zonal | C95 Ruy Lopez, Closed, Breyer |
| 23. I Mendivil vs E Asfora |
| 1-0 | 82 | 1963 | Fortaleza Zonal | C46 Three Knights |
| 24. M de Athayde vs I Mendivil |
| ½-½ | 35 | 1963 | Fortaleza Zonal | C78 Ruy Lopez |
| 25. J F Olivera vs I Mendivil |
| ½-½ | 21 | 1963 | Fortaleza Zonal | B32 Sicilian |
Kibitzing
