| 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. D Flores vs M Villanueva |
| 1-0 | 25 | 2016 | 91st ch-ARG | A16 English |
| 28. S Alonso vs M Villanueva |
| ½-½ | 21 | 2016 | Universidad La Punta GM | B90 Sicilian, Najdorf |
| 29. M Villanueva vs D Flores |
| ½-½ | 42 | 2016 | Universidad La Punta GM | C63 Ruy Lopez, Schliemann Defense |
| 30. M Villanueva vs A Stripunsky |
| 1-0 | 33 | 2017 | PRO Chess League (Atlantic) | B43 Sicilian, Kan, 5.Nc3 |
| 31. M Villanueva vs A Fishbein |
| ½-½ | 32 | 2017 | PRO Chess League (Atlantic) | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 32. Benjamin vs M Villanueva |
| 1-0 | 27 | 2017 | PRO Chess League (Atlantic) | C42 Petrov Defense |
| 33. A Katz vs M Villanueva |
| 0-1 | 65 | 2017 | PRO Chess League (Atlantic) | C42 Petrov Defense |
| 34. A Zapata vs M Villanueva |
| ½-½ | 60 | 2017 | PRO Chess League (Atlantic) | C43 Petrov, Modern Attack |
| 35. M Villanueva vs R Francisco |
| ½-½ | 98 | 2017 | PRO Chess League (Atlantic) | C78 Ruy Lopez |
| 36. M Villanueva vs D Gurevich |
| ½-½ | 74 | 2017 | PRO Chess League (Atlantic) | B12 Caro-Kann Defense |
| 37. E Moradiabadi vs M Villanueva |
| 0-1 | 38 | 2017 | PRO Chess League (Atlantic) | C48 Four Knights |
| 38. M Villanueva vs A Vovk |
| 1-0 | 45 | 2017 | PRO League Group Stage | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 39. S Erenburg vs M Villanueva |
| 1-0 | 51 | 2017 | PRO League Group Stage | C42 Petrov Defense |
| 40. B Sambuev vs M Villanueva |
| 1-0 | 50 | 2017 | PRO League Group Stage | A48 King's Indian |
| 41. M Villanueva vs G Szabo |
 | 0-1 | 59 | 2017 | PRO League Group Stage | C05 French, Tarrasch |
| 42. M Villanueva vs C Dolezal |
| 1-0 | 45 | 2017 | 92nd ch-ARG | B06 Robatsch |
| 43. E Real de Azua vs M Villanueva |
| ½-½ | 20 | 2017 | 92nd ch-ARG | E04 Catalan, Open, 5.Nf3 |
| 44. M Villanueva vs Pichot |
| ½-½ | 34 | 2017 | 92nd ch-ARG | B33 Sicilian |
| 45. D Flores vs M Villanueva |
| 1-0 | 21 | 2017 | 92nd ch-ARG | A05 Reti Opening |
| 46. M Villanueva vs T Sosa |
| ½-½ | 65 | 2017 | 92nd ch-ARG | C78 Ruy Lopez |
| 47. F Perez Ponsa vs M Villanueva |
| ½-½ | 31 | 2017 | 92nd ch-ARG | A07 King's Indian Attack |
| 48. M Villanueva vs J F Pierrot |
| 1-0 | 66 | 2017 | 92nd ch-ARG | C42 Petrov Defense |
| 49. S Mareco vs M Villanueva |
| ½-½ | 37 | 2017 | 92nd ch-ARG | A04 Reti Opening |
| 50. M Villanueva vs L Krysa |
| 0-1 | 35 | 2017 | 92nd ch-ARG | C87 Ruy Lopez |
Kibitzing
