| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H Al-Hadarani vs J L Guerra Osio |
| 0-1 | 62 | 1981 | World Youth U26 Team Championship | A04 Reti Opening |
| 27. J L Guerra Osio vs G Kaspret |
| 1-0 | 66 | 1981 | World Youth U26 Team Championship | B16 Caro-Kann, Bronstein-Larsen Variation |
| 28. A Duer vs J L Guerra Osio |
| 1-0 | 51 | 1981 | World Youth U26 Team Championship | A10 English |
| 29. J L Guerra Osio vs M Karp |
| 1-0 | 35 | 1981 | World Youth U26 Team Championship | C02 French, Advance |
| 30. S Hmadi vs J L Guerra Osio |
| 1-0 | 23 | 1981 | World Youth U26 Team Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 31. D Donchev vs J L Guerra Osio |
| 1-0 | 33 | 1982 | Lucerne Olympiad | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 32. D Vucenovic vs J L Guerra Osio |
| 0-1 | 29 | 1982 | Lucerne Olympiad | A10 English |
| 33. E Arlandi vs J L Guerra Osio |
| ½-½ | 25 | 1982 | Lucerne Olympiad | E32 Nimzo-Indian, Classical |
| 34. J L Guerra Osio vs Hjartarson |
| ½-½ | 22 | 1982 | Lucerne Olympiad | C47 Four Knights |
| 35. J Ye vs J L Guerra Osio |
| 1-0 | 33 | 1982 | Lucerne Olympiad | B90 Sicilian, Najdorf |
| 36. Sax vs J L Guerra Osio |
| 1-0 | 19 | 1986 | Dubai Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 37. J L Guerra Osio vs W Schmidt |
| 0-1 | 41 | 1986 | Dubai Olympiad | B83 Sicilian |
| 38. J L Guerra Osio vs Kotronias |
| 0-1 | 50 | 1986 | Dubai Olympiad | B83 Sicilian |
| 39. A Zapata vs J L Guerra Osio |
| 1-0 | 31 | 1986 | Dubai Olympiad | B50 Sicilian |
| 40. J L Guerra Osio vs M Orr |
| ½-½ | 42 | 1986 | Dubai Olympiad | B13 Caro-Kann, Exchange |
| 41. J L Guerra Osio vs J Yrjola |
| 1-0 | 44 | 1986 | Dubai Olympiad | B08 Pirc, Classical |
Kibitzing
