| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. M Santos vs K Mekhitarian |
| 1-0 | 46 | 2005 | Brazilian Championship | E29 Nimzo-Indian, Samisch |
| 52. M Santos vs M Crosa Coll |
| 1-0 | 42 | 2006 | IRT5 | A85 Dutch, with c4 & Nc3 |
| 53. D Di Berardino vs M Santos |
| ½-½ | 38 | 2006 | San Jose do Rio Preto | A06 Reti Opening |
| 54. M Santos vs J F Cubas |
| 1-0 | 39 | 2006 | San Jose do Rio Preto | D07 Queen's Gambit Declined, Chigorin Defense |
| 55. L Borges vs M Santos |
| 0-1 | 63 | 2006 | Regina Helena Marques 4th | A06 Reti Opening |
| 56. M Santos vs M Larrea |
| 1-0 | 32 | 2006 | Regina Helena Marques 4th | E76 King's Indian, Four Pawns Attack |
| 57. C Valiente vs M Santos |
| ½-½ | 11 | 2006 | Regina Helena Marques 4th | A01 Nimzovich-Larsen Attack |
| 58. M Santos vs Bachmann |
| ½-½ | 11 | 2006 | Regina Helena Marques 4th | D20 Queen's Gambit Accepted |
| 59. D Stamenkovic vs M Santos |
| 1-0 | 51 | 2006 | Regina Helena Marques 4th | D00 Queen's Pawn Game |
| 60. M Santos vs L Maia |
| ½-½ | 27 | 2006 | Regina Helena Marques 4th | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 61. J Rosito vs M Santos |
| ½-½ | 13 | 2006 | Regina Helena Marques 4th | C63 Ruy Lopez, Schliemann Defense |
| 62. E Choma vs M Santos |
| 0-1 | 14 | 2006 | Regina Helena Marques 4th | D34 Queen's Gambit Declined, Tarrasch |
| 63. M Santos vs F Cavalcanti |
| 1-0 | 51 | 2006 | Regina Helena Marques 4th | D35 Queen's Gambit Declined |
| 64. C A Sega vs M Santos |
| ½-½ | 41 | 2006 | Regina Helena Marques 4th | A13 English |
| 65. M Santos vs H van Riemsdijk |
| ½-½ | 9 | 2006 | Regina Helena Marques 4th | E28 Nimzo-Indian, Samisch Variation |
| 66. E Matsuura vs M Santos |
| ½-½ | 35 | 2006 | Sao Paulo IRT5 op | D32 Queen's Gambit Declined, Tarrasch |
| 67. E Cordova vs M Santos |
| 1-0 | 33 | 2007 | Interclubes Paulista | D43 Queen's Gambit Declined Semi-Slav |
| 68. G Vescovi vs M Santos |
| 1-0 | 40 | 2007 | Sao Paulo Interclubes Paulista | D12 Queen's Gambit Declined Slav |
| 69. M Santos vs F de Cresce El Debs |
| 0-1 | 41 | 2007 | Sao Jose do Rio Preto 6th | D11 Queen's Gambit Declined Slav |
| 70. M Santos vs L Perdomo |
| 0-1 | 30 | 2007 | Sao Jose do Rio Preto 6th | E80 King's Indian, Samisch Variation |
| 71. J F Cubas vs M Santos |
| 0-1 | 36 | 2007 | Sao Jose do Rio Preto 6th | C55 Two Knights Defense |
| 72. A Alvarez Pedraza vs M Santos |
| ½-½ | 29 | 2007 | Capablanca mem op 42nd | C55 Two Knights Defense |
| 73. M Santos vs F de Cresce El Debs |
| ½-½ | 19 | 2007 | Sao Paulo Paulista-ch | D45 Queen's Gambit Declined Semi-Slav |
| 74. E Matsuura vs M Santos |
| ½-½ | 34 | 2007 | Sao Paulo Paulista-ch | C63 Ruy Lopez, Schliemann Defense |
| 75. A Fier vs M Santos |
| 1-0 | 85 | 2009 | Continental ch-Americas | D08 Queen's Gambit Declined, Albin Counter Gambit |
Kibitzing
