| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Pedro Arrata Peralta vs D Rivera |
| 0-1 | 33 | 1982 | Lucerne Olympiad | A07 King's Indian Attack |
| 27. J Torres vs D Rivera |
| 0-1 | 40 | 1984 | Uruguayan Championship | A49 King's Indian, Fianchetto without c4 |
| 28. B Roselli Mailhe vs D Rivera |
| 1-0 | 30 | 1984 | Uruguayan Championship | B40 Sicilian |
| 29. D Rivera vs M Rodriguez |
| 1-0 | 48 | 1984 | Uruguayan Championship | C95 Ruy Lopez, Closed, Breyer |
| 30. D Rivera vs D Izquierdo |
| 1-0 | 34 | 1984 | Uruguayan Championship | C65 Ruy Lopez, Berlin Defense |
| 31. D Rivera vs W Estrada Degrandi |
| ½-½ | 17 | 1984 | Uruguayan Championship | B08 Pirc, Classical |
| 32. D Rivera vs J Escofet |
| 1-0 | 38 | 1984 | Uruguayan Championship | B05 Alekhine's Defense, Modern |
| 33. D Rivera vs D Diano |
| 1-0 | 59 | 1984 | Uruguayan Championship | C91 Ruy Lopez, Closed |
| 34. D Rivera vs A Bauza |
| ½-½ | 39 | 1984 | Uruguayan Championship | B07 Pirc |
| 35. D Rivera vs E Aguilera |
| ½-½ | 41 | 1984 | Uruguayan Championship | C75 Ruy Lopez, Modern Steinitz Defense |
| 36. A Riccetto vs D Rivera |
| 1-0 | 53 | 1984 | Uruguayan Championship | B57 Sicilian |
| 37. J Casteran vs D Rivera |
| 0-1 | 33 | 1984 | Uruguayan Championship | B32 Sicilian |
| 38. M Barboza vs D Rivera |
| 0-1 | 41 | 1984 | Uruguayan Championship | A64 Benoni, Fianchetto, 11...Re8 |
| 39. J Bademian Orchanian vs D Rivera |
| 0-1 | 54 | 1984 | Uruguayan Championship | B22 Sicilian, Alapin |
| 40. E Almada vs D Rivera |
| 0-1 | 40 | 1984 | Uruguayan Championship | A48 King's Indian |
| 41. D Rivera vs R Cifuentes |
| ½-½ | 15 | 1985 | 2nd Pan American Team Championship | B89 Sicilian |
| 42. F Santacruz vs D Rivera |
| ½-½ | 20 | 1985 | 2nd Pan American Team Championship | A38 English, Symmetrical |
| 43. D Rivera vs E Alborta Tito |
| ½-½ | 46 | 1985 | 2nd Pan American Team Championship | C84 Ruy Lopez, Closed |
| 44. M Gonzalez Bernal vs D Rivera |
| 0-1 | 39 | 1985 | 2nd Pan American Team Championship | B63 Sicilian, Richter-Rauzer Attack |
| 45. Panno vs D Rivera |
| 1-0 | 42 | 1985 | 2nd Pan American Team Championship | A34 English, Symmetrical |
| 46. F Braga vs D Rivera |
| 0-1 | 53 | 1986 | Dubai Olympiad | B63 Sicilian, Richter-Rauzer Attack |
| 47. D Rivera vs E Grivas |
| ½-½ | 30 | 1986 | Dubai Olympiad | C80 Ruy Lopez, Open |
| 48. D Rivera vs Y E Liao |
| 1-0 | 72 | 1986 | Dubai Olympiad | B84 Sicilian, Scheveningen |
| 49. A Rodriguez vs D Rivera |
| 1-0 | 33 | 1988 | Pan-American Championship | B50 Sicilian |
| 50. D Rivera vs A Strikovic |
| 0-1 | 72 | 1989 | Seville op | B42 Sicilian, Kan |
Kibitzing
