| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Villanueva vs L Bronstein |
| ½-½ | 27 | 2003 | Argentine Championship | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 2. G Malbran vs M Villanueva |
| ½-½ | 57 | 2003 | Argentine Championship | C48 Four Knights |
| 3. M Villanueva vs L Gargiulo |
  | ½-½ | 19 | 2003 | Argentine Championship | C25 Vienna |
| 4. M Villanueva vs A Nogues Acuna Jr |
| ½-½ | 29 | 2003 | Argentine Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 5. F J Jimenez Villena vs M Villanueva |
| ½-½ | 29 | 2003 | Argentine Championship | C44 King's Pawn Game |
| 6. F Pedro vs M Villanueva |
| ½-½ | 28 | 2003 | Argentine Championship | C00 French Defense |
| 7. M Villanueva vs C Godoy |
| 1-0 | 34 | 2003 | Argentine Championship | A00 Uncommon Opening |
| 8. P Della Morte vs M Villanueva |
| 1-0 | 38 | 2003 | Argentine Championship | C42 Petrov Defense |
| 9. M Villanueva vs H Alvarez Castillo |
| 1-0 | 29 | 2003 | Argentine Championship | B09 Pirc, Austrian Attack |
| 10. J Szmetan vs M Villanueva |
| 1-0 | 33 | 2003 | Chesspangenberg op 1st | C47 Four Knights |
| 11. M Villanueva vs S Mareco |
| 1-0 | 27 | 2004 | Buenos Aires Najdorf Talents | B31 Sicilian, Rossolimo Variation |
| 12. J F Pierrot vs M Villanueva |
| 1-0 | 47 | 2004 | Argentine Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 13. M Villanueva vs S Slipak |
| 0-1 | 79 | 2004 | Argentine Championship | B18 Caro-Kann, Classical |
| 14. G Needleman vs M Villanueva |
| ½-½ | 65 | 2004 | Argentine Championship | B70 Sicilian, Dragon Variation |
| 15. M Villanueva vs J Rubinetti |
| 0-1 | 29 | 2004 | Argentine Championship | C00 French Defense |
| 16. M Villanueva vs R Hungaski |
| 0-1 | 21 | 2005 | Villa Ballester LV op | D44 Queen's Gambit Declined Semi-Slav |
| 17. M Villanueva vs N Sanduay |
| 1-0 | 30 | 2005 | Villa Ballester LV op | A57 Benko Gambit |
| 18. E Scarella vs M Villanueva |
| 0-1 | 39 | 2006 | Villa Ballester op 56th | E61 King's Indian |
| 19. M Villanueva vs R Hungaski |
| 0-1 | 69 | 2007 | Avellaneda op | C45 Scotch Game |
| 20. E Scarella vs M Villanueva |
| 1-0 | 53 | 2007 | LNA Puma Cup | D93 Grunfeld, with Bf4 & e3 |
| 21. L Bronstein vs M Villanueva |
| ½-½ | 31 | 2009 | Champions League CAA | C42 Petrov Defense |
| 22. L Liascovich vs M Villanueva |
| ½-½ | 21 | 2010 | I Jorge Duarte IM | C46 Three Knights |
| 23. W J Stewart vs M Villanueva |
| 1-0 | 48 | 2010 | I Jorge Duarte IM | A04 Reti Opening |
| 24. M Villanueva vs M J Tempone |
| ½-½ | 50 | 2010 | I Jorge Duarte IM | C41 Philidor Defense |
| 25. M Villanueva vs S Mareco |
| 1-0 | 33 | 2014 | 89th ch-ARG | B94 Sicilian, Najdorf |
Kibitzing
