| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. D Arenas vs O Sepp |
| ½-½ | 109 | 2010 | Khanty-Mansiysk Olympiad | C65 Ruy Lopez, Berlin Defense |
| 52. D Arenas vs A Pridorozhni |
| 0-1 | 32 | 2010 | Khanty-Mansiysk Olympiad | C41 Philidor Defense |
| 53. D Arenas vs P Lafuente |
| 0-1 | 29 | 2010 | Khanty-Mansiysk Olympiad | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 54. D Arenas vs A C Salazar |
| 1-0 | 20 | 2010 | Panam-Cont | B72 Sicilian, Dragon |
| 55. J C Guerrero vs D Arenas |
| 0-1 | 42 | 2010 | Panam-Cont | E94 King's Indian, Orthodox |
| 56. D Arenas vs A Gallego Alcaraz |
| 1-0 | 37 | 2010 | Panam-Cont | B33 Sicilian |
| 57. I R Ortiz Suarez vs D Arenas |
| 1-0 | 37 | 2010 | Panam-Cont | B77 Sicilian, Dragon, Yugoslav Attack |
| 58. D Arenas vs L Arias |
| 0-1 | 45 | 2010 | Panam-Cont | B43 Sicilian, Kan, 5.Nc3 |
| 59. D Arenas vs H Contreras |
| 0-1 | 56 | 2010 | Panam-Cont | B50 Sicilian |
| 60. J Buitrago vs D Arenas |
| 0-1 | 47 | 2010 | Panam-Cont | E91 King's Indian |
| 61. D Arenas vs C Zuluaga |
| ½-½ | 18 | 2010 | Panam-Cont | B43 Sicilian, Kan, 5.Nc3 |
| 62. D Arenas vs R Felgaer |
| ½-½ | 51 | 2011 | Continental | B07 Pirc |
| 63. F Corrales Jimenez vs D Arenas |
| 1-0 | 57 | 2011 | Continental | B76 Sicilian, Dragon, Yugoslav Attack |
| 64. J Nogueiras vs D Arenas |
| 1-0 | 31 | 2011 | Continental | A16 English |
| 65. L Parals Marce vs D Arenas |
| 0-1 | 47 | 2012 | 38th Sitges Open | E63 King's Indian, Fianchetto, Panno Variation |
| 66. D Arenas vs G Buxade Roca |
| 1-0 | 40 | 2012 | 38th Sitges Open | B33 Sicilian |
| 67. J Czakon vs D Arenas |
| 1-0 | 27 | 2012 | 38th Sitges Open | E17 Queen's Indian |
| 68. D Arenas vs C Rabineau |
| 1-0 | 28 | 2012 | 38th Sitges Open | A10 English |
| 69. M Munoz Pantoja vs D Arenas |
| ½-½ | 59 | 2012 | 38th Sitges Open | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 70. D Arenas vs A Vidarte Morales |
| 1-0 | 69 | 2012 | 38th Sitges Open | C78 Ruy Lopez |
| 71. S Barrientos Chavarriaga vs D Arenas |
| 0-1 | 36 | 2012 | 38th Sitges Open | B75 Sicilian, Dragon, Yugoslav Attack |
| 72. D Arenas vs R R Laxman |
 | 1-0 | 25 | 2012 | 38th Sitges Open | C42 Petrov Defense |
| 73. E Vorobiov vs D Arenas |
| ½-½ | 12 | 2012 | 38th Sitges Open | E63 King's Indian, Fianchetto, Panno Variation |
| 74. D Arenas vs J Obregon Rivero |
| ½-½ | 48 | 2012 | 38th Badalona Open A | B32 Sicilian |
| 75. B Lalith vs D Arenas |
| 1-0 | 48 | 2012 | 38th Badalona Open A | E17 Queen's Indian |
Kibitzing
