| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Imad Arafih vs R Chavez Chavez |
| 1-0 | 43 | 1978 | Buenos Aires Olympiad | A36 English |
| 27. F Trois vs R Chavez Chavez |
| 1-0 | 66 | 1978 | Buenos Aires Olympiad | B06 Robatsch |
| 28. Quinteros vs R Chavez Chavez |
| 1-0 | 33 | 1985 | Corrientes Zonal | E06 Catalan, Closed, 5.Nf3 |
| 29. R Chavez Chavez vs L Bronstein |
| 0-1 | 40 | 1985 | Corrientes Zonal | C64 Ruy Lopez, Classical |
| 30. C Gamarra Caceres vs R Chavez Chavez |
| 0-1 | 26 | 1985 | Corrientes Zonal | D06 Queen's Gambit Declined |
| 31. J Sunye Neto vs R Chavez Chavez |
| 1-0 | 32 | 1985 | Corrientes Zonal | A36 English |
| 32. R Chavez Chavez vs M Abarca Aguirre |
| 0-1 | 37 | 1985 | Corrientes Zonal | B56 Sicilian |
| 33. R Chavez Chavez vs Z Franco Ocampos |
| ½-½ | 43 | 1985 | 2nd Pan American Team Championship | B56 Sicilian |
| 34. R Cifuentes vs R Chavez Chavez |
| ½-½ | 62 | 1985 | 2nd Pan American Team Championship | E80 King's Indian, Samisch Variation |
| 35. R Chavez Chavez vs B Roselli Mailhe |
| 0-1 | 29 | 1985 | 2nd Pan American Team Championship | B71 Sicilian, Dragon, Levenfish Variation |
| 36. Najdorf vs R Chavez Chavez |
| 1-0 | 52 | 1985 | 2nd Pan American Team Championship | E91 King's Indian |
| 37. G Milos vs R Chavez Chavez |
| 0-1 | 39 | 1985 | 2nd Pan American Team Championship | D18 Queen's Gambit Declined Slav, Dutch |
| 38. J Gomez Baillo vs R Chavez Chavez |
| 1-0 | 66 | 1985 | Corrientes Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 39. R Chavez Chavez vs I Morovic Fernandez |
| 0-1 | 43 | 1985 | Corrientes Zonal | B40 Sicilian |
| 40. H van Riemsdijk vs R Chavez Chavez |
| ½-½ | 61 | 1985 | Corrientes Zonal | B89 Sicilian |
| 41. R Chavez Chavez vs G Milos |
| 0-1 | 29 | 1985 | Corrientes Zonal | B05 Alekhine's Defense, Modern |
| 42. R Cifuentes vs R Chavez Chavez |
| 0-1 | 43 | 1985 | Corrientes Zonal | A40 Queen's Pawn Game |
| 43. R Chavez Chavez vs R Filguth |
| 1-0 | 45 | 1985 | Corrientes Zonal | B77 Sicilian, Dragon, Yugoslav Attack |
| 44. J Reyes vs R Chavez Chavez |
| 1-0 | 76 | 1985 | Corrientes Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 45. R Chavez Chavez vs B Roselli Mailhe |
| 0-1 | 58 | 1985 | Corrientes Zonal | B77 Sicilian, Dragon, Yugoslav Attack |
| 46. J Szmetan vs R Chavez Chavez |
| ½-½ | 63 | 1985 | Corrientes Zonal | A38 English, Symmetrical |
| 47. R Chavez Chavez vs G Barbero |
| 1-0 | 39 | 1985 | Corrientes Zonal | B45 Sicilian, Taimanov |
| 48. P Ricardi vs R Chavez Chavez |
| 0-1 | 64 | 1985 | Corrientes Zonal | E90 King's Indian |
| 49. R Chavez Chavez vs C S Santacruz |
| 1-0 | 45 | 1985 | Corrientes Zonal | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 50. Panno vs R Chavez Chavez |
| 1-0 | 43 | 1986 | Dubai Olympiad | A15 English |
Kibitzing
