| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. J Koch vs G Hernandez Guerrero |
| 0-1 | 54 | 1989 | World Junior Championship | B57 Sicilian |
| 52. G Hernandez Guerrero vs I Manor |
| ½-½ | 56 | 1989 | World Junior Championship | B06 Robatsch |
| 53. G Hernandez Guerrero vs K Ruxton |
| 1-0 | 40 | 1989 | World Junior Championship | B18 Caro-Kann, Classical |
| 54. J Sorensen vs G Hernandez Guerrero |
| 1-0 | 89 | 1989 | World Junior Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 55. G Hernandez Guerrero vs A Rodriguez Vila |
| ½-½ | 42 | 1989 | World Junior Championship | C19 French, Winawer, Advance |
| 56. G Hernandez Guerrero vs V Kontic |
| 0-1 | 40 | 1989 | World Junior Championship | C03 French, Tarrasch |
| 57. L Y Hsu vs G Hernandez Guerrero |
| 0-1 | 38 | 1989 | World Junior Championship | A25 English |
| 58. G Hernandez Guerrero vs M Todorcevic |
| 1-0 | 25 | 1990 | Lyon op | B06 Robatsch |
| 59. R Har-Zvi vs G Hernandez Guerrero |
| 0-1 | 39 | 1990 | Lyon FRA | A25 English |
| 60. J Borges Matos vs G Hernandez Guerrero |
| 1-0 | 52 | 1990 | Pinar del Rio Zonal | D20 Queen's Gambit Accepted |
| 61. G Hernandez Guerrero vs A Moran Nuque |
| ½-½ | 48 | 1990 | Cali zt | A46 Queen's Pawn Game |
| 62. G Hernandez Guerrero vs O Santana |
| 1-0 | 61 | 1990 | Pinar del Rio zt | E69 King's Indian, Fianchetto, Classical Main line |
| 63. G Hernandez Guerrero vs G Garcia |
| 1-0 | 78 | 1990 | Cali zt | A04 Reti Opening |
| 64. G Hernandez Guerrero vs D Alzate |
| 1-0 | 64 | 1990 | Cali zt | C63 Ruy Lopez, Schliemann Defense |
| 65. G Hernandez Guerrero vs Damljanovic |
| ½-½ | 46 | 1990 | Lyon op | B57 Sicilian |
| 66. A Rodriguez vs G Hernandez Guerrero |
| ½-½ | 15 | 1990 | Cali zt | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 67. G Hernandez Guerrero vs C Cuartas |
| 0-1 | 29 | 1990 | Bogota op | C02 French, Advance |
| 68. L Riemersma vs G Hernandez Guerrero |
| 0-1 | 25 | 1990 | Lyon op | B32 Sicilian |
| 69. G Hernandez Guerrero vs Philippe Testard |
| 1-0 | 41 | 1990 | Lyon op | B92 Sicilian, Najdorf, Opocensky Variation |
| 70. G Hernandez Guerrero vs J Diaz |
| ½-½ | 52 | 1990 | Pinar del Rio zt | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 71. G Hernandez Guerrero vs M Roeder |
| ½-½ | 11 | 1990 | Lyon op | B92 Sicilian, Najdorf, Opocensky Variation |
| 72. A Zapata vs G Hernandez Guerrero |
| 1-0 | 30 | 1990 | Cali zt | B63 Sicilian, Richter-Rauzer Attack |
| 73. J Turner vs G Hernandez Guerrero |
| 0-1 | 24 | 1990 | Pinar del Rio zt | A53 Old Indian |
| 74. P Paneque Martin vs G Hernandez Guerrero |
 | ½-½ | 61 | 1990 | Cali zt | A25 English |
| 75. G Hernandez Guerrero vs W Arencibia Rodriguez |
| ½-½ | 27 | 1990 | Cali zt | C12 French, McCutcheon |
Kibitzing
