| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. C Sagredo vs M Fierro |
| 0-1 | 38 | 2001 | Curacao | A10 English |
| 52. M Fierro vs M Glienke |
| 1-0 | 67 | 2001 | Curacao | B13 Caro-Kann, Exchange |
| 53. B Kelly vs M Fierro |
| ½-½ | 27 | 2002 | Wrexham | D31 Queen's Gambit Declined |
| 54. M Fierro vs K Kachiani-Gersinska |
| 0-1 | 70 | 2002 | Bled Olympiad (Women) | B14 Caro-Kann, Panov-Botvinnik Attack |
| 55. I Ostry vs M Fierro |
| 0-1 | 35 | 2002 | Bled Olympiad (Women) | A13 English |
| 56. M Fierro vs F La Rota |
| 0-1 | 23 | 2003 | Internet Section 16-B | B15 Caro-Kann |
| 57. A Wojtkiewicz vs M Fierro |
| 1-0 | 27 | 2003 | Canadian op | A04 Reti Opening |
| 58. M Fierro vs A Zatonskih |
| ½-½ | 23 | 2003 | Canadian op | C00 French Defense |
| 59. I Ibragimov vs M Fierro |
| 1-0 | 25 | 2003 | 104th US Open | A42 Modern Defense, Averbakh System |
| 60. S Kriventsov vs M Fierro |
| 1-0 | 36 | 2003 | 80th New York Masters | B01 Scandinavian |
| 61. M Fierro vs W Arencibia Rodriguez |
| 0-1 | 46 | 2003 | 7th Pan American Team Championship | A46 Queen's Pawn Game |
| 62. J Vera Insfran vs M Fierro |
| 0-1 | 47 | 2003 | 7th Pan American Team Championship | B27 Sicilian |
| 63. R Disconzi da Silva vs M Fierro |
| 1-0 | 37 | 2003 | 7th Pan American Team Championship | A49 King's Indian, Fianchetto without c4 |
| 64. I Ibragimov vs M Fierro |
| 0-1 | 39 | 2003 | North American op | B01 Scandinavian |
| 65. D Gurevich vs M Fierro |
| 1-0 | 33 | 2003 | North American op | B27 Sicilian |
| 66. M Fierro vs Yermolinsky |
| 0-1 | 60 | 2003 | North American op | D02 Queen's Pawn Game |
| 67. W J Donaldson vs M Fierro |
| 1-0 | 44 | 2004 | Virginia Beach Millennium op 5th | B08 Pirc, Classical |
| 68. N Pogonina vs M Fierro |
| 1-0 | 67 | 2004 | ACP Blitz (Women) 1st | B01 Scandinavian |
| 69. M Fierro vs P Cramling |
 | 0-1 | 38 | 2004 | Calvia Olympiad (Women) | B42 Sicilian, Kan |
| 70. M Fierro vs J Jackova |
| 1-0 | 31 | 2004 | Calvia Olympiad (Women) | C77 Ruy Lopez |
| 71. Chiburdanidze vs M Fierro |
| 1-0 | 42 | 2004 | Calvia Olympiad (Women) | E60 King's Indian Defense |
| 72. M Fierro vs E Sedina |
| ½-½ | 13 | 2004 | Calvia Olympiad (Women) | C09 French, Tarrasch, Open Variation, Main line |
| 73. A Muzychuk vs M Fierro |
| 1-0 | 55 | 2004 | Calvia Olympiad (Women) | B01 Scandinavian |
| 74. Korneev vs M Fierro |
| 1-0 | 16 | 2005 | Magistral Huila 100 años - Neiva | B01 Scandinavian |
| 75. R Saladen Dulce vs M Fierro |
| 0-1 | 32 | 2005 | American Continental | B06 Robatsch |
Kibitzing
