| — | Ruben Domingo Nunez | 1–0 | Adrian Gonzalez Laso | 8th 'Ciudad de Oviedo' Open | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| — | Gabriela Vargas | 0–1 | Ruben Domingo Nunez | 8th 'Ciudad de Oviedo' Open | Queen's Pawn Game: Modern Defense | |
| Dec 8, 2023 | Ruben Domingo Nunez | ½–½ | Evgeny Zanan | Round 9: Ruben Domingo Nunez - Evgeny Zanan | King's Indian Attack: Double Fianchetto | |
| Dec 6, 2023 | Chatterjee Utsab | 0–1 | Ruben Domingo Nunez | Round 8: Chatterjee Utsab - Ruben Domingo Nunez | Alekhine Defense: Exchange Variation, Voronezh Variation | |
| Dec 6, 2023 | Ruben Domingo Nunez | 1–0 | Hugo Garijo Perez | Round 7: Ruben Domingo Nunez - Hugo Garijo Perez | English Opening: Anglo-Dutch Defense | |
| Dec 4, 2023 | Andres Iglesias Ferreira | ½–½ | Ruben Domingo Nunez | Round 6: Andres Iglesias Ferreira - Ruben Domingo Nunez | Modern Defense: Standard Defense | |
| Dec 4, 2023 | Ruben Domingo Nunez | 1–0 | Javier De La Puerta Cresis | Round 5: Ruben Domingo Nunez - Javier De La Puerta Cresis | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Dec 4, 2023 | K P Pranav | 0–1 | Ruben Domingo Nunez | Round 4: K P Pranav - Ruben Domingo Nunez | Nimzo-Indian Defense: Normal Variation | |
| Dec 2, 2023 | Ruben Domingo Nunez | 0–1 | Jose Torres Sanchez | Round 3: Ruben Domingo Nunez - Jose Torres Sanchez | Sicilian Defense: Najdorf Variation | |
| Dec 1, 2023 | Vasiliy Shimelkov | 0–1 | Ruben Domingo Nunez | Round 2: Vasiliy Shimelkov - Ruben Domingo Nunez | Queen's Indian Defense: Kasparov Variation | |
| Dec 1, 2023 | Ruben Domingo Nunez | 1–0 | Walter Mattia Duraccio | Round 1: Ruben Domingo Nunez - Walter Mattia Duraccio | Caro-Kann Defense: Maróczy Variation | |
| May 27, 2023 | Ruben Domingo Nunez | 0–1 | Carlos S. Matamoros Franco | Round 8: Ruben Domingo Nunez - Carlos S. Matamoros Franco | Philidor Defense: Lion Variation | |
| May 27, 2023 | Guillermo Rios Gallardo | * | Ruben Domingo Nunez | Round 7: Guillermo Rios Gallardo - Ruben Domingo Nunez | ? | |
| May 27, 2023 | Ruben Domingo Nunez | ½–½ | Jose Carlos Ibarra Jerez | Round 6: Ruben Domingo Nunez - Jose Carlos Ibarra Jerez | Indian Defense: Wade-Tartakower Defense | |
| May 27, 2023 | Ruben Domingo Nunez | * | Juan Chacon Perez | Round 5: Ruben Domingo Nunez - Juan Chacon Perez | ? | |
| May 27, 2023 | Manuel Perez Candelario | 1–0 | Ruben Domingo Nunez | Round 4: Manuel Perez Candelario - Ruben Domingo Nunez | Modern Defense: Standard Line | |
| May 27, 2023 | Ruben Domingo Nunez | * | Angel Reyes Lopez | Round 3: Ruben Domingo Nunez - Angel Reyes Lopez | ? | |
| May 27, 2023 | Jose Manuel Garrido Collantes | * | Ruben Domingo Nunez | Round 2: Jose Manuel Garrido Collantes - Ruben Domingo Nunez | ? | |
| May 27, 2023 | Ruben Domingo Nunez | * | Jose David Aguilera Concha | Round 1: Ruben Domingo Nunez - Jose David Aguilera Concha | ? | |
| Apr 10, 2023 | Conor E Murphy | 0–1 | Ruben Domingo Nunez | Ronda 9: Conor E Murphy - Ruben Domingo Nunez | Benoni Defense: Fianchetto Variation | |
| Apr 9, 2023 | Brandon Jacobson | ½–½ | Ruben Domingo Nunez | Ronda 7: Brandon Jacobson - Ruben Domingo Nunez | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Jul 20, 2022 | Juan Rottenwohrer Suarez | 1–0 | Ruben Domingo Nunez | Round 6: Juan Rottenwohrer Suarez - Ruben Domingo Nunez | Zukertort Opening: Sicilian Invitation | |
| Jul 20, 2022 | Ruben Domingo Nunez | ½–½ | Alejandro Domingo Nunez | Round 5: Ruben Domingo Nunez - Alejandro Domingo Nunez | French Defense: Exchange Variation | |
| Jul 19, 2022 | Diego Vergara Anton | ½–½ | Ruben Domingo Nunez | Round 4: Diego Vergara Anton - Ruben Domingo Nunez | Indian Defense: Przepiorka Variation | |
