| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A C Rocha vs H A Machado Jr |
| ½-½ | 13 | 1981 | Brazilian Championship | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 27. S Cunha Pereira vs H A Machado Jr |
| 0-1 | 63 | 1983 | Brazilian Championship | C63 Ruy Lopez, Schliemann Defense |
| 28. H A Machado Jr vs J Sunye Neto |
| ½-½ | 62 | 1983 | Brazilian Championship | B40 Sicilian |
| 29. L Loureiro vs H A Machado Jr |
| ½-½ | 15 | 1983 | Brazilian Championship | A07 King's Indian Attack |
| 30. C Soares vs H A Machado Jr |
| ½-½ | 79 | 1983 | Brazilian Championship | C12 French, McCutcheon |
| 31. H A Machado Jr vs C Braga |
| ½-½ | 78 | 1983 | Brazilian Championship | A56 Benoni Defense |
| 32. H A Machado Jr vs A Resende |
| 1-0 | 40 | 1983 | Brazilian Championship | B06 Robatsch |
| 33. P L Oliveira vs H A Machado Jr |
| 0-1 | 57 | 1983 | Brazilian Championship | D35 Queen's Gambit Declined |
| 34. H A Machado Jr vs G Milos |
| 0-1 | 24 | 1983 | Brazilian Championship | B01 Scandinavian |
| 35. H A Machado Jr vs H Camara |
| 1-0 | 56 | 1983 | Brazilian Championship | B01 Scandinavian |
| 36. J Mann de Toledo vs H A Machado Jr |
| ½-½ | 28 | 1983 | Brazilian Championship | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 37. H A Machado Jr vs D van Riemsdijk |
| 1-0 | 32 | 1983 | Brazilian Championship | B13 Caro-Kann, Exchange |
| 38. L Menna Barreto vs H A Machado Jr |
| 1-0 | 24 | 1983 | Brazilian Championship | A51 Budapest Gambit |
| 39. J Soares Masculo vs H A Machado Jr |
| 0-1 | 56 | 1983 | Brazilian Championship | A10 English |
| 40. H A Machado Jr vs I B de Souza |
| 0-1 | 39 | 1983 | Brazilian Championship | B82 Sicilian, Scheveningen |
| 41. A S Segal vs H A Machado Jr |
| 0-1 | 51 | 1983 | Brazilian Championship | A69 Benoni, Four Pawns Attack, Main line |
| 42. M Paolozzi vs H A Machado Jr |
| 1-0 | 55 | 1983 | Brazilian Championship | C24 Bishop's Opening |
| 43. H A Machado Jr vs H van Riemsdijk |
| 1-0 | 42 | 1983 | Brazilian Championship | B45 Sicilian, Taimanov |
| 44. A de Castro vs H A Machado Jr |
| ½-½ | 39 | 1986 | Brazilian Championship | A05 Reti Opening |
| 45. A S Segal vs H A Machado Jr |
| ½-½ | 27 | 1986 | Brazilian Championship | A67 Benoni, Taimanov Variation |
| 46. L Menna Barreto vs H A Machado Jr |
| 1-0 | 44 | 1986 | Brazilian Championship | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 47. H A Machado Jr vs F Trois |
| ½-½ | 51 | 1986 | Brazilian Championship | B10 Caro-Kann |
| 48. H A Machado Jr vs E Tsuboi |
| ½-½ | 39 | 1986 | Brazilian Championship | A04 Reti Opening |
| 49. H A Machado Jr vs J Mann de Toledo |
| ½-½ | 76 | 1986 | Brazilian Championship | C84 Ruy Lopez, Closed |
| 50. G Milos vs H A Machado Jr |
| 1-0 | 27 | 1986 | Brazilian Championship | A49 King's Indian, Fianchetto without c4 |
Kibitzing
