| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H van Riemsdijk vs A Mascarenhas |
| 0-1 | 50 | 1985 | Rio de Janeiro | C80 Ruy Lopez, Open |
| 27. N Ioseliani vs A Mascarenhas |
| 1-0 | 43 | 1985 | Rio de Janeiro | C40 King's Knight Opening |
| 28. A Mascarenhas vs Sveshnikov |
| 0-1 | 30 | 1985 | Rio de Janeiro | A13 English |
| 29. L Loureiro vs A Mascarenhas |
| 0-1 | 31 | 1985 | Rio de Janeiro | B89 Sicilian |
| 30. A Mascarenhas vs J Rubinetti |
 | ½-½ | 72 | 1985 | Rio de Janeiro | D37 Queen's Gambit Declined |
| 31. P Ricardi vs A Mascarenhas |
| ½-½ | 43 | 1985 | Rio de Janeiro | E15 Queen's Indian |
| 32. A Mascarenhas vs C E Toth |
| ½-½ | 35 | 1985 | Rio de Janeiro | C67 Ruy Lopez |
| 33. E Limp vs A Mascarenhas |
| ½-½ | 20 | 1985 | Rio de Janeiro | C80 Ruy Lopez, Open |
| 34. I Morovic Fernandez vs A Mascarenhas |
| ½-½ | 42 | 1985 | Rio de Janeiro | C40 King's Knight Opening |
| 35. A Mascarenhas vs J Sunye Neto |
| 0-1 | 40 | 1985 | Rio de Janeiro | A07 King's Indian Attack |
| 36. A Mascarenhas vs Quinteros |
| 0-1 | 54 | 1985 | Rio de Janeiro | A32 English, Symmetrical Variation |
| 37. A Mascarenhas vs G Milos |
| 0-1 | 29 | 1985 | Rio de Janeiro | C45 Scotch Game |
| 38. A Mascarenhas vs F Capiberibe |
| 1-0 | 32 | 1986 | Brazilian Championship | A36 English |
| 39. R Teixeira vs A Mascarenhas |
| ½-½ | 34 | 1986 | Brazilian Championship | E00 Queen's Pawn Game |
| 40. A Mascarenhas vs G Milos |
| 0-1 | 61 | 1986 | Brazilian Championship | D98 Grunfeld, Russian |
| 41. A Mascarenhas vs H van Riemsdijk |
| ½-½ | 14 | 1986 | Brazilian Championship | A32 English, Symmetrical Variation |
| 42. A Mascarenhas vs A de Castro |
| ½-½ | 72 | 1986 | Brazilian Championship | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 43. M A Asfora vs A Mascarenhas |
| 1-0 | 40 | 1986 | Brazilian Championship | A07 King's Indian Attack |
| 44. A Mascarenhas vs P Toth |
| ½-½ | 66 | 1986 | Brazilian Championship | A36 English |
| 45. L Gentil Junior vs A Mascarenhas |
| 0-1 | 33 | 1986 | Brazilian Championship | D32 Queen's Gambit Declined, Tarrasch |
| 46. A Mascarenhas vs A Resende |
| ½-½ | 10 | 1986 | Brazilian Championship | A24 English, Bremen System with ...g6 |
| 47. C Braga vs A Mascarenhas |
| 1-0 | 31 | 1986 | Brazilian Championship | A00 Uncommon Opening |
| 48. L Menna Barreto vs A Mascarenhas |
| 0-1 | 36 | 1986 | Brazilian Championship | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 49. Kramnik vs A Mascarenhas |
| 1-0 | 40 | 1991 | Masters-Challengers | A56 Benoni Defense |
| 50. A Mascarenhas vs Kramnik |
| ½-½ | 55 | 1991 | Masters-Challengers | A80 Dutch |
Kibitzing
