| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H Bravo Sedamanos vs P H Donoso Velasco |
| 1-0 | 42 | 1975 | Fortaleza Zonal | D19 Queen's Gambit Declined Slav, Dutch |
| 27. H Camara vs P H Donoso Velasco |
| 0-1 | 51 | 1975 | Fortaleza Zonal | D02 Queen's Pawn Game |
| 28. P H Donoso Velasco vs O Benitez |
| ½-½ | 29 | 1975 | Fortaleza Zonal | C92 Ruy Lopez, Closed |
| 29. P H Donoso Velasco vs C Gamarra Caceres |
| 1-0 | 40 | 1975 | Fortaleza Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 30. L Bronstein vs P H Donoso Velasco |
| 1-0 | 61 | 1975 | Fortaleza Zonal | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 31. F Trois vs P H Donoso Velasco |
| 0-1 | 33 | 1975 | Fortaleza Zonal | C65 Ruy Lopez, Berlin Defense |
| 32. P H Donoso Velasco vs H van Riemsdijk |
| 1-0 | 40 | 1975 | Fortaleza Zonal | C91 Ruy Lopez, Closed |
| 33. C Gouveia vs P H Donoso Velasco |
| 1-0 | 37 | 1975 | Fortaleza Zonal | A22 English |
| 34. Quinteros vs P H Donoso Velasco |
| ½-½ | 21 | 1975 | Fortaleza Zonal | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 35. P H Donoso Velasco vs J Szmetan |
| 1-0 | 41 | 1975 | Fortaleza Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 36. P H Donoso Velasco vs A S Segal |
| 0-1 | 72 | 1975 | Fortaleza Zonal | B06 Robatsch |
| 37. P Garcia Toledo vs P H Donoso Velasco |
| 0-1 | 27 | 1975 | Fortaleza Zonal | B86 Sicilian, Fischer-Sozin Attack |
| 38. P H Donoso Velasco vs M S Grunberg |
| 1-0 | 50 | 1975 | Fortaleza Zonal | B06 Robatsch |
| 39. P H Donoso Velasco vs J Emma |
| ½-½ | 39 | 1975 | Fortaleza Zonal | B05 Alekhine's Defense, Modern |
| 40. P H Donoso Velasco vs Panno |
| ½-½ | 41 | 1975 | Fortaleza Zonal | B84 Sicilian, Scheveningen |
| 41. R Sanguineti vs P H Donoso Velasco |
| 1-0 | 23 | 1975 | Fortaleza Zonal | A15 English |
| 42. C Silva Sanchez vs P H Donoso Velasco |
| ½-½ | 34 | 1975 | Fortaleza Zonal | A13 English |
| 43. P H Donoso Velasco vs J Gutierrez |
| ½-½ | 17 | 1976 | Haifa Olympiad | C10 French |
| 44. Evans vs P H Donoso Velasco |
| 1-0 | 74 | 1976 | Haifa Olympiad | D37 Queen's Gambit Declined |
| 45. P H Donoso Velasco vs J Bademian Orchanian |
| 1-0 | 38 | 1976 | Haifa Olympiad | C26 Vienna |
| 46. H Olafsson vs P H Donoso Velasco |
| 1-0 | 40 | 1976 | Haifa Olympiad | A12 English with b3 |
| 47. A Huss vs P H Donoso Velasco |
| 0-1 | 23 | 1976 | Haifa Olympiad | D18 Queen's Gambit Declined Slav, Dutch |
| 48. P H Donoso Velasco vs B Jansson |
| 1-0 | 60 | 1976 | Haifa Olympiad | B83 Sicilian |
| 49. B Toth vs P H Donoso Velasco |
| 0-1 | 46 | 1976 | Haifa Olympiad | D17 Queen's Gambit Declined Slav |
| 50. J H Donner vs P H Donoso Velasco |
| ½-½ | 35 | 1976 | Haifa Olympiad | D46 Queen's Gambit Declined Semi-Slav |
Kibitzing
