| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Castro Madrigal vs M Arias Santana |
| 0-1 | 73 | 2005 | LXVIII ch-CRC | A16 English |
| 27. C Granados vs M Arias Santana |
 | ½-½ | 17 | 2005 | LXVIII ch-CRC | B02 Alekhine's Defense |
| 28. M Arias Santana vs F Hernandez Basante |
| ½-½ | 16 | 2005 | LXVIII ch-CRC | B56 Sicilian |
| 29. M Arias Santana vs S Bermudez Vives |
| ½-½ | 13 | 2005 | LXVIII ch-CRC | C92 Ruy Lopez, Closed |
| 30. S Minero Pineda vs M Arias Santana |
| ½-½ | 10 | 2005 | LXVIII ch-CRC | D37 Queen's Gambit Declined |
| 31. M Arias Santana vs V Akopian |
| ½-½ | 31 | 2010 | Khanty-Mansiysk Olympiad | D32 Queen's Gambit Declined, Tarrasch |
| 32. F Eid vs M Arias Santana |
| ½-½ | 34 | 2010 | Khanty-Mansiysk Olympiad | A00 Uncommon Opening |
| 33. Topalov vs M Arias Santana |
| 1-0 | 65 | 2010 | Khanty-Mansiysk Olympiad | B04 Alekhine's Defense, Modern |
| 34. M Arias Santana vs J F Nelis |
| 1-0 | 78 | 2010 | Khanty-Mansiysk Olympiad | D93 Grunfeld, with Bf4 & e3 |
| 35. B Olape vs M Arias Santana |
| 1-0 | 83 | 2010 | Khanty-Mansiysk Olympiad | C90 Ruy Lopez, Closed |
| 36. M Arias Santana vs Sveshnikov |
| 0-1 | 55 | 2010 | Khanty-Mansiysk Olympiad | D47 Queen's Gambit Declined Semi-Slav |
| 37. M Arias Santana vs J D Gemy |
| 1-0 | 32 | 2010 | Khanty-Mansiysk Olympiad | C10 French |
| 38. J F Cubas vs M Arias Santana |
| 1-0 | 28 | 2010 | Khanty-Mansiysk Olympiad | B80 Sicilian, Scheveningen |
| 39. M Arias Santana vs C McNab |
| 0-1 | 64 | 2010 | Khanty-Mansiysk Olympiad | E94 King's Indian, Orthodox |
| 40. S Boidiya vs M Arias Santana |
| 0-1 | 45 | 2010 | Khanty-Mansiysk Olympiad | A34 English, Symmetrical |
| 41. M Arias Santana vs W C C Perera |
| ½-½ | 35 | 2010 | Khanty-Mansiysk Olympiad | E92 King's Indian |
| 42. M Arias Santana vs Shankland |
| 0-1 | 46 | 2012 | Philadelphia Open | B96 Sicilian, Najdorf |
| 43. C Gu vs M Arias Santana |
| 0-1 | 72 | 2012 | Philadelphia Open | A04 Reti Opening |
| 44. M Arias Santana vs Iturrizaga Bonelli |
| 0-1 | 56 | 2012 | 40th World Open | A15 English |
| 45. A Evdokimov vs M Arias Santana |
| 1-0 | 37 | 2012 | 40th World Open | E11 Bogo-Indian Defense |
| 46. M Arias Santana vs Shyaam Nikhil P |
| ½-½ | 28 | 2012 | 40th World Open | B06 Robatsch |
| 47. M Arias Santana vs M Bartel |
| 0-1 | 28 | 2012 | Istanbul Olympiad | A80 Dutch |
| 48. A Dgebuadze vs M Arias Santana |
| 1-0 | 37 | 2012 | Istanbul Olympiad | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 49. V Malisauskas vs M Arias Santana |
| 1-0 | 33 | 2012 | Istanbul Olympiad | D11 Queen's Gambit Declined Slav |
| 50. M Arias Santana vs F Elsness |
| ½-½ | 36 | 2012 | Istanbul Olympiad | A15 English |
Kibitzing
