| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. L P Supi vs M Villanueva |
| 1-0 | 59 | 2014 | 18th Copa Mercosur | D38 Queen's Gambit Declined, Ragozin Variation |
| 27. A C Obregon vs M Villanueva |
| 1-0 | 36 | 2016 | Argentine Championship | C42 Petrov Defense |
| 28. S Slipak vs M Villanueva |
| 1-0 | 39 | 2016 | Argentine Championship | A48 King's Indian |
| 29. M Villanueva vs L Krysa |
| 0-1 | 41 | 2016 | Argentine Championship | C67 Ruy Lopez |
| 30. Pichot vs M Villanueva |
| 1-0 | 33 | 2016 | Argentine Championship | C18 French, Winawer |
| 31. M Villanueva vs D Valerga |
| ½-½ | 31 | 2016 | Argentine Championship | C07 French, Tarrasch |
| 32. T Sosa vs M Villanueva |
| ½-½ | 35 | 2016 | Argentine Championship | C03 French, Tarrasch |
| 33. M Villanueva vs G Della Morte |
| 1-0 | 45 | 2016 | Argentine Championship | C91 Ruy Lopez, Closed |
| 34. E Real de Azua vs M Villanueva |
| ½-½ | 19 | 2016 | Argentine Championship | E90 King's Indian |
| 35. M Villanueva vs F Perez Ponsa |
| ½-½ | 23 | 2016 | Argentine Championship | E46 Nimzo-Indian |
| 36. D Flores vs M Villanueva |
| 1-0 | 25 | 2016 | Argentine Championship | A16 English |
| 37. M Villanueva vs M Bitelmajer |
| 1-0 | 38 | 2016 | Argentine Championship | C95 Ruy Lopez, Closed, Breyer |
| 38. P I Acosta vs M Villanueva |
| 1-0 | 40 | 2016 | Argentine Championship | A05 Reti Opening |
| 39. M Villanueva vs J Zamorano |
| 1-0 | 26 | 2016 | Argentine Championship | B94 Sicilian, Najdorf |
| 40. M Villanueva vs C Garcia Palermo |
| 1-0 | 25 | 2016 | Universidad La Punta GM | B07 Pirc |
| 41. S Alonso vs M Villanueva |
| ½-½ | 21 | 2016 | Universidad La Punta GM | B90 Sicilian, Najdorf |
| 42. M Villanueva vs N Abarca Gonzalez |
| ½-½ | 59 | 2016 | Universidad La Punta GM | C67 Ruy Lopez |
| 43. R Molina vs M Villanueva |
| 1-0 | 29 | 2016 | Universidad La Punta GM | B81 Sicilian, Scheveningen, Keres Attack |
| 44. M Villanueva vs D Flores |
| ½-½ | 42 | 2016 | Universidad La Punta GM | C63 Ruy Lopez, Schliemann Defense |
| 45. K Paveto vs M Villanueva |
| 0-1 | 73 | 2016 | Universidad La Punta GM | C00 French Defense |
| 46. M Villanueva vs E Real de Azua |
| 0-1 | 35 | 2016 | Universidad La Punta GM | C92 Ruy Lopez, Closed |
| 47. M Villanueva vs P I Acosta |
| ½-½ | 61 | 2016 | Universidad La Punta GM | B48 Sicilian, Taimanov Variation |
| 48. M Perez Gormaz vs M Villanueva |
| 1-0 | 24 | 2016 | Universidad La Punta GM | A07 King's Indian Attack |
| 49. Benjamin vs M Villanueva |
| 1-0 | 27 | 2017 | PRO Chess League (Atlantic) | C42 Petrov Defense |
| 50. M Villanueva vs A Fishbein |
| ½-½ | 32 | 2017 | PRO Chess League (Atlantic) | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
Kibitzing
