| Oct 15, 2023 | Santiago Ospina Castro | ½–½ | Elizabeth Toro Castaneda | Round 8: Santiago Ospina Castro - Elizabeth Toro Castaneda | Sicilian Defense: Closed | |
| Oct 15, 2023 | Laura Lucia Dominguez | ½–½ | Santiago Ospina Castro | Round 7: Laura Lucia Dominguez - Santiago Ospina Castro | Sicilian Defense: Moscow Variation | |
| Sep 26, 2023 | Santiago Ospina Castro | 0–1 | Esteban Alberto Valderrama Quiceno | Round 8: Santiago Ospina Castro - Esteban Alberto Valderrama Quiceno | Modern Defense: Two Knights Variation, Suttles Variation | |
| Sep 26, 2023 | Santiago Ospina Castro | 1–0 | Leibnitz Edison Rojas Castillo | Round 5: Santiago Ospina Castro - Leibnitz Edison Rojas Castillo | Ruy Lopez: Schliemann Defense | |
| Sep 26, 2023 | Santiago Ospina Castro | * | Andres Jeronimo Zapata Montoya | Round 3: Santiago Ospina Castro - Andres Jeronimo Zapata Montoya | Zukertort Opening: Nimzo-Larsen Variation | |
| Sep 26, 2023 | Santiago Ospina Castro | * | Wilmar Andres Vargas Serna | Round 2: Santiago Ospina Castro - Wilmar Andres Vargas Serna | French Defense: Normal Variation | |
| Sep 26, 2023 | Wilmar Andres Vargas Serna | 0–1 | Santiago Ospina Castro | Round 1: Wilmar Andres Vargas Serna - Santiago Ospina Castro | Queen's Pawn Game: Mason Attack | |
| Sep 25, 2023 | Miguel Angel Soto Gonzalez | 1–0 | Santiago Ospina Castro | XXX Juegos Universitarios Nacionales ASCUN 2023 Ajedrez Clasico Absoluto. | French Defense: Classical Variation, Steinitz Variation | |
| Sep 25, 2023 | Santiago Ospina Castro | 1–0 | Leibnitz Edison Rojas Castillo | Round 5: Santiago Ospina Castro - Leibnitz Edison Rojas Castillo | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Sep 24, 2023 | Santiago Ospina Castro | ½–½ | Eduardo Alejandro Llano Bautista | XXX Juegos Universitarios Nacionales ASCUN 2023 Ajedrez Clasico Absoluto. | Sicilian Defense: Closed, Traditional | |
| Sep 24, 2023 | Jhon Edison Munoz Galvez | ½–½ | Santiago Ospina Castro | Round 3: Jhon Edison Munoz Galvez - Santiago Ospina Castro | Bogo-Indian Defense: Retreat Variation | |
| Sep 23, 2023 | Juan Manuel Diaz Larrea | 0–1 | Santiago Ospina Castro | Round 2: Juan Manuel Diaz Larrea - Santiago Ospina Castro | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Sep 23, 2023 | Santiago Ospina Castro | * | Jesus David Barrios Gonzalez | Round 1: Santiago Ospina Castro - Jesus David Barrios Gonzalez | French Defense: Two Knights Variation | |
| Aug 7, 2023 | Carlos Jose Pinero Rodriguez | 1–0 | Santiago Ospina Castro | Round 9: Carlos Jose Pinero Rodriguez - Santiago Ospina Castro | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Aug 7, 2023 | Sebastian Marin Posada | ½–½ | Santiago Ospina Castro | Round 8: Sebastian Marin Posada - Santiago Ospina Castro | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Aug 6, 2023 | Santiago Ospina Castro | 0–1 | Angel Gabriel Cordoba Roa | Round 7: Santiago Ospina Castro - Angel Gabriel Cordoba Roa | Italian Game: Giuoco Piano | |
| Aug 6, 2023 | Santiago Ospina Castro | 1–0 | Anderson Esmeraldas Huachi | Round 6: Santiago Ospina Castro - Anderson Esmeraldas Huachi | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Aug 5, 2023 | Juan Manuel Cuervo Velasquez | 0–1 | Santiago Ospina Castro | Round 5: Juan Manuel Cuervo Velasquez - Santiago Ospina Castro | English Opening: Agincourt Defense | |
| Aug 5, 2023 | Wilson Guillermo Palencia Morales | ½–½ | Santiago Ospina Castro | Round 4: Wilson Guillermo Palencia Morales - Santiago Ospina Castro | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Aug 5, 2023 | Santiago Ospina Castro | ½–½ | Santiago Loaiza Cuervo | Round 3: Santiago Ospina Castro - Santiago Loaiza Cuervo | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Aug 4, 2023 | Alejandro Rios Parra | ½–½ | Santiago Ospina Castro | Round 2: Alejandro Rios Parra - Santiago Ospina Castro | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jul 3, 2023 | Santiago Ospina Castro | ½–½ | Pablo Alexander Ruiz Aguilar | Round 8: Santiago Ospina Castro - Pablo Alexander Ruiz Aguilar | Sicilian Defense: Kan Variation, Knight Variation | |
| Jun 29, 2023 | Rafael Felipe Prasca Sosa | 1–0 | Santiago Ospina Castro | Round 3: Rafael Felipe Prasca Sosa - Santiago Ospina Castro | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jun 28, 2023 | Jorge Cori | 1–0 | Santiago Ospina Castro | Round 1: Jorge Cori - Santiago Ospina Castro | Sicilian Defense: Moscow Variation, Main Line | |
| Jun 19, 2023 | Zamir Narvaez | 1–0 | Santiago Ospina Castro | Round 7: Zamir Narvaez - Santiago Ospina Castro | English Opening: Agincourt Defense | |
| Jun 19, 2023 | Santiago Ospina Castro | ½–½ | Ernesto Aponte Castillo | Round 6: Santiago Ospina Castro - Ernesto Aponte Castillo | French Defense: Exchange Variation | |
| Jun 18, 2023 | Juan Pablo Sierra Mejia | 0–1 | Santiago Ospina Castro | Round 5: Juan Pablo Sierra Mejia - Santiago Ospina Castro | Queen's Gambit Declined: Tartakower Defense | |
| Jun 18, 2023 | Santiago Ospina Castro | ½–½ | Luis Angel Florez Salazar | Round 4: Santiago Ospina Castro - Luis Angel Florez Salazar | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Jun 17, 2023 | Samuel Mesa Baez | ½–½ | Santiago Ospina Castro | Round 3: Samuel Mesa Baez - Santiago Ospina Castro | Sicilian Defense: Chekhover Variation | |
| Jun 17, 2023 | Santiago Ospina Castro | 1–0 | Miguel Alfredo Carrillo Parra | Round 2: Santiago Ospina Castro - Miguel Alfredo Carrillo Parra | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
