Game |
| Result | Moves |
Year | Event/Locale | Opening |
26. K Janetschek vs R Hernandez Onna |
| ½-½ | 40 | 1970 | Siegen Olympiad Final-B | B49 Sicilian, Taimanov Variation |
27. R Hernandez Onna vs Ujtumen |
| 0-1 | 31 | 1970 | Siegen Olympiad Final-B | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
28. R Hernandez Onna vs M Fuller |
| ½-½ | 42 | 1970 | Siegen Olympiad Final-B | E43 Nimzo-Indian, Fischer Variation |
29. R Hernandez Onna vs R Hartoch |
| ½-½ | 34 | 1970 | Siegen Olympiad Final-B | A57 Benko Gambit |
30. R Hernandez Onna vs K Ojanen |
| 1-0 | 32 | 1970 | Siegen Olympiad Final-B | E97 King's Indian |
31. R Hernandez Onna vs S Holm |
| 0-1 | 40 | 1970 | Siegen Olympiad Final-B | A62 Benoni, Fianchetto Variation |
32. Parma vs R Hernandez Onna |
| 1-0 | 22 | 1971 | Capablanca Memorial | B50 Sicilian |
33. R Hernandez Onna vs Velimirovic |
| 0-1 | 31 | 1971 | Capablanca Memorial | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
34. R Hernandez Onna vs E Cobo Arteaga |
| ½-½ | 19 | 1971 | Capablanca Memorial | C92 Ruy Lopez, Closed |
35. Hort vs R Hernandez Onna |
| ½-½ | 53 | 1971 | Capablanca Memorial | D32 Queen's Gambit Declined, Tarrasch |
36. R Hernandez Onna vs O Troianescu |
| 1-0 | 48 | 1971 | Capablanca Memorial | A35 English, Symmetrical |
37. R Hernandez Onna vs A Hennings |
| 0-1 | 46 | 1971 | Capablanca Memorial | B13 Caro-Kann, Exchange |
38. R Hernandez Onna vs G Tringov |
| 0-1 | 41 | 1971 | Capablanca Memorial | A56 Benoni Defense |
39. R Hernandez Onna vs J Rodriguez Gonzalez |
| ½-½ | 48 | 1971 | Capablanca Memorial | D80 Grunfeld |
40. R Hernandez Onna vs I Bilek |
| ½-½ | 61 | 1971 | Capablanca Memorial | E82 King's Indian, Samisch, double Fianchetto Variation |
41. R Hernandez Onna vs Gipslis |
| 0-1 | 54 | 1971 | Capablanca Memorial | A35 English, Symmetrical |
42. L Barczay vs R Hernandez Onna |
| 0-1 | 48 | 1971 | Capablanca Memorial | B47 Sicilian, Taimanov (Bastrikov) Variation |
43. Letelier vs R Hernandez Onna |
| 0-1 | 42 | 1971 | Capablanca Memorial | E97 King's Indian |
44. C Fernandez Bravo vs R Hernandez Onna |
| 0-1 | 19 | 1971 | Capablanca Memorial | B44 Sicilian |
45. Geller vs R Hernandez Onna |
 | 1-0 | 39 | 1971 | Capablanca Memorial | A07 King's Indian Attack |
46. J H Donner vs R Hernandez Onna |
| 1-0 | 23 | 1971 | Capablanca Memorial | D34 Queen's Gambit Declined, Tarrasch |
47. C Ingolotti vs R Hernandez Onna |
| 0-1 | 34 | 1971 | 1st Pan American Team Championship | B42 Sicilian, Kan |
48. R Hernandez Onna vs C Jauregui |
| 1-0 | 52 | 1971 | 1st Pan American Team Championship | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
49. H Camara vs R Hernandez Onna |
| 1-0 | 39 | 1971 | 1st Pan American Team Championship | A26 English |
50. N Elenberg vs R Hernandez Onna |
| 0-1 | 37 | 1971 | 1st Pan American Team Championship | D34 Queen's Gambit Declined, Tarrasch |