| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. D Arenas vs G Vescovi |
| 1-0 | 44 | 2010 | Magistral Bicentenario | C84 Ruy Lopez, Closed |
| 27. N Delgado Ramirez vs D Arenas |
| 1-0 | 24 | 2010 | Magistral Bicentenario | B50 Sicilian |
| 28. D Arenas vs Bachmann |
| ½-½ | 35 | 2010 | Magistral Bicentenario | B08 Pirc, Classical |
| 29. J Becerra Rivero vs D Arenas |
| ½-½ | 40 | 2010 | Magistral Bicentenario | B50 Sicilian |
| 30. D Arenas vs O Zambrana |
| 1-0 | 58 | 2010 | Magistral Bicentenario | B32 Sicilian |
| 31. D Arenas vs M Matlakov |
| 0-1 | 68 | 2010 | World Junior Championship | C67 Ruy Lopez |
| 32. A Roos vs D Arenas |
| 0-1 | 50 | 2010 | World Junior Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 33. D Arenas vs A Diamant |
| 1-0 | 69 | 2010 | World Junior Championship | B49 Sicilian, Taimanov Variation |
| 34. N Huschenbeth vs D Arenas |
| 1-0 | 57 | 2010 | World Junior Championship | B50 Sicilian |
| 35. D Arenas vs S Guo-Yuthok |
| 1-0 | 42 | 2010 | World Junior Championship | C53 Giuoco Piano |
| 36. S Martinovic vs D Arenas |
| 1-0 | 39 | 2010 | World Junior Championship | E81 King's Indian, Samisch |
| 37. V Durarbayli vs D Arenas |
| 1-0 | 39 | 2010 | World Junior Championship | B77 Sicilian, Dragon, Yugoslav Attack |
| 38. D Arenas vs Ngoc Lan Tran |
| 1-0 | 58 | 2010 | World Junior Championship | C65 Ruy Lopez, Berlin Defense |
| 39. D Arenas vs J Ashwin |
| 1-0 | 40 | 2010 | World Junior Championship | B90 Sicilian, Najdorf |
| 40. Debashis Das vs D Arenas |
| ½-½ | 58 | 2010 | World Junior Championship | B90 Sicilian, Najdorf |
| 41. D Arenas vs P Potapov |
| ½-½ | 41 | 2010 | World Junior Championship | B32 Sicilian |
| 42. D Dvirnyy vs D Arenas |
| 1-0 | 27 | 2010 | World Junior Championship | B72 Sicilian, Dragon |
| 43. D Arenas vs D Recuero Guerra |
| ½-½ | 12 | 2010 | World Junior Championship | C55 Two Knights Defense |
| 44. D Fekadu vs D Arenas |
| 0-1 | 77 | 2010 | Khanty-Mansiysk Olympiad | E81 King's Indian, Samisch |
| 45. D Arenas vs L Guerra Tulcan |
| ½-½ | 44 | 2010 | Khanty-Mansiysk Olympiad | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 46. D Arenas vs B Adhiban |
| ½-½ | 76 | 2010 | Khanty-Mansiysk Olympiad | B12 Caro-Kann Defense |
| 47. K Stupak vs D Arenas |
| ½-½ | 71 | 2010 | Khanty-Mansiysk Olympiad | A40 Queen's Pawn Game |
| 48. D Arenas vs A Ismagambetov |
| ½-½ | 30 | 2010 | Khanty-Mansiysk Olympiad | C67 Ruy Lopez |
| 49. D Arenas vs V Genba |
| 0-1 | 41 | 2010 | Khanty-Mansiysk Olympiad | C67 Ruy Lopez |
| 50. M Heidenfeld vs D Arenas |
| 0-1 | 36 | 2010 | Khanty-Mansiysk Olympiad | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
Kibitzing
