| Apr 5, 2026 | Gomez Cabrera | 0–1 | Ospina Castro | Round 7: Gomez Cabrera, Juan David - Ospina Castro, Santiago | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 5, 2026 | Ospina Castro | 1–0 | Burbano Rodriguez | Round 6: Ospina Castro, Santiago - Burbano Rodriguez, Angel Gabriel | Queen's Pawn Game: Anti-Torre | |
| Apr 5, 2026 | Ospina Castro | ½–½ | Pinillo Canon | Round 5: Ospina Castro, Santiago - Pinillo Canon, Silvana | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 5, 2026 | Palomino Escobar | 0–1 | Ospina Castro | Round 4: Palomino Escobar, Daniel Fernando - Ospina Castro, Santiago | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 5, 2026 | Ospina Castro | 1–0 | Ballesteros Lopez | Round 3: Ospina Castro, Santiago - Ballesteros Lopez, William | Nimzo-Larsen Attack: Classical Variation | |
| Apr 5, 2026 | Giraldo Guevara | 0–1 | Ospina Castro | Round 2: Giraldo Guevara, Juan Diego - Ospina Castro, Santiago | Queen's Gambit Declined: Tartakower Defense | |
| Apr 5, 2026 | Ospina Castro | 1–0 | Rodriguez Valencia | Round 11: Ospina Castro, Santiago - Rodriguez Valencia, Sebastian | English Opening: Agincourt Defense, Wimpy System | |
| Apr 5, 2026 | Gonzalez Velasco | * | Ospina Castro | Round 10: Gonzalez Velasco, Leandro - Ospina Castro, Santiago | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 5, 2026 | Ospina Castro | * | Mera Rivas | Round 9: Ospina Castro, Santiago - Mera Rivas, Jose Moises | English Opening: Agincourt Defense, Wimpy System | |
| Apr 5, 2026 | Ardila | * | Ospina Castro | Round 8: Ardila, Oscar Humberto - Ospina Castro, Santiago | Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation | |
| Apr 5, 2026 | Ospina Castro | ½–½ | Cardona Duque | Round 7: Ospina Castro, Santiago - Cardona Duque, Juan Esteban | Zukertort Opening: Sicilian Invitation | |
| Apr 5, 2026 | Mora Munoz | 1–0 | Ospina Castro | Round 6: Mora Munoz, Alejandro - Ospina Castro, Santiago | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 4, 2026 | Castro Castro | 0–1 | Ospina Castro | Round 3: Castro Castro, Joaquin - Ospina Castro, Santiago | Queen's Gambit Declined: Three Knights Variation | |
| Apr 4, 2026 | Ospina Castro | 1–0 | Delgado Calle | Round 2: Ospina Castro, Santiago - Delgado Calle, Julian | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 4, 2026 | Ospina Castro | ½–½ | Lopez Rayo | Round 5: Ospina Castro, Santiago - Lopez Rayo, Santiago | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 4, 2026 | Ospina Castro | 1–0 | Campos Gomez | Round 4: Ospina Castro, Santiago - Campos Gomez, Manuel | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 4, 2026 | Cruz Duque | 0–1 | Ospina Castro | Round 1: Cruz Duque, Esteban - Ospina Castro, Santiago | French Defense: Exchange Variation | |
| Jan 11, 2026 | Ospina Castro | ½–½ | Salazar | Round 8: Ospina Castro, Santiago - Salazar, Andres Felipe | French Defense: Exchange Variation | |
| Jan 11, 2026 | Vargas Benavides | ½–½ | Ospina Castro | Round 7: Vargas Benavides, Mauricio - Ospina Castro, Santiago | Queen's Pawn Game: London System, with e6 | |
| Jan 10, 2026 | Ospina Castro | 0–1 | Cano Alcaraz | Round 6: Ospina Castro, Santiago - Cano Alcaraz, Juan Jose | Caro-Kann Defense: Main Line | |
| Jan 10, 2026 | Lopez Idarraga | 0–1 | Ospina Castro | Round 5: Lopez Idarraga, Daniel Eduardo - Ospina Castro, Santiago | Queen's Pawn Game: Torre Attack | |
| Jan 10, 2026 | Ospina Castro | 1–0 | Pineda Arevalo | Round 4: Ospina Castro, Santiago - Pineda Arevalo, Jose Ariel | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jan 9, 2026 | Tobar Beltran | 0–1 | Ospina Castro | Round 3: Tobar Beltran, Miguel Angel - Ospina Castro, Santiago | Horwitz Defense | |
| Jan 8, 2026 | Ospina Castro | ½–½ | Longas Serrano | Round 2: Ospina Castro, Santiago - Longas Serrano, Edgar | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jan 8, 2026 | Zuluaga | 0–1 | Ospina Castro | Round 1: Zuluaga, Nicolas - Ospina Castro, Santiago | Indian Defense: London System | |
| Jan 8, 2026 | Ospina Castro | 1–0 | Jaramillo | Round 9: Ospina Castro, Santiago - Jaramillo, Victor Fabian | Zukertort Opening: Nimzo-Larsen Variation | |
| Jan 8, 2026 | Arango Arenas | 1–0 | Ospina Castro | Round 8: Arango Arenas, Juan Camilo - Ospina Castro, Santiago | Rapport-Jobava System | |
| Jan 8, 2026 | Ospina Castro | 1–0 | Rios | Round 7: Ospina Castro, Santiago - Rios, David | Zukertort Opening: Queen's Gambit Invitation | |
| Jan 7, 2026 | Munoz Galvez | 1–0 | Ospina Castro | Round 6: Munoz Galvez, Jhon Edison - Ospina Castro, Santiago | King's Indian Attack | |
| Jan 7, 2026 | Ospina Castro | 1–0 | Roldan Arboleda | Round 4: Ospina Castro, Santiago - Roldan Arboleda, Jorge Alain | Zukertort Opening: Nimzo-Larsen Variation | |
| Jan 7, 2026 | Ospina Castro | 1–0 | Gutierrez | Round 3: Ospina Castro, Santiago - Gutierrez, Jhon Jaime | Zukertort Opening: Queen's Gambit Invitation | |
| Jan 7, 2026 | Lopez Ramirez | 0–1 | Ospina Castro | Round 2: Lopez Ramirez, Jorge Hernan - Ospina Castro, Santiago | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jan 7, 2026 | Ospina Castro | 1–0 | Celis Vargas | Round 1: Ospina Castro, Santiago - Celis Vargas, Walter Enrique | Réti Opening: Anglo-Slav Variation, Bled Variation | |
| Jan 7, 2026 | Hernandez Jimenez | ½–½ | Ospina Castro | Round 5: Hernandez Jimenez, Xavi - Ospina Castro, Santiago | French Defense: Advance Variation | |
| May 12, 2025 | Valencia Quinchia | 0–1 | Ospina Castro | Round 7: Valencia Quinchia, Isabella - Ospina Castro, Santiago | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| May 11, 2025 | Ospina Castro | 1–0 | Henao Orozco | Round 6: Ospina Castro, Santiago - Henao Orozco, Luis Carlos | Bishop's Opening: Vienna Hybrid, Spielmann Attack | |
| May 10, 2025 | Diaz Larrea | ½–½ | Ospina Castro | Round 5: Diaz Larrea, Juan Manuel - Ospina Castro, Santiago | French Defense: Tarrasch Variation | |
| May 10, 2025 | Ospina Castro | 0–1 | Arango | Round 4: Ospina Castro, Santiago - Arango, Andres Mauricio | Sicilian Defense: French Variation, Westerinen Attack | |
| May 9, 2025 | Restrepo Ortiz | ½–½ | Ospina Castro | Round 3: Restrepo Ortiz, Brayan David - Ospina Castro, Santiago | French Defense: Classical Variation, Steinitz Variation | |
| May 8, 2025 | Ospina Castro | 1–0 | Negron Lizarazo | Round 2: Ospina Castro, Santiago - Negron Lizarazo, Juan Sebastian | Sicilian Defense: Moscow Variation, Main Line | |
| May 7, 2025 | Gallego Herrera | 0–1 | Ospina Castro | Round 1: Gallego Herrera, Santiago - Ospina Castro, Santiago | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Apr 19, 2025 | Martinez Serna | ½–½ | Ospina Castro | Round 9: Martinez Serna, Juan Esteban - Ospina Castro, Santiago | Queen's Gambit Declined: Harrwitz Attack | |
| Apr 18, 2025 | Mora Moron | 0–1 | Ospina Castro | Round 8: Mora Moron, Jose Ramon - Ospina Castro, Santiago | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Apr 18, 2025 | Ospina Castro | 0–1 | Arrieta Hernandez | Round 7: Ospina Castro, Santiago - Arrieta Hernandez, Cristian | French Defense: Tarrasch Variation, Haberditz Variation | |
| Apr 17, 2025 | Gomez Barrero | 0–1 | Ospina Castro | Round 6: Gomez Barrero, Sergio - Ospina Castro, Santiago | Nimzo-Larsen Attack: Indian Variation | |
| Apr 17, 2025 | Ospina Castro | 1–0 | Duran Barraza | Round 5: Ospina Castro, Santiago - Duran Barraza, Mateo Andres | Bishop's Opening: Vienna Hybrid, Spielmann Attack | |
| Apr 16, 2025 | Loaiza Cuervo | ½–½ | Ospina Castro | Round 4: Loaiza Cuervo, Santiago - Ospina Castro, Santiago | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Apr 15, 2025 | Ospina Castro | ½–½ | Sanchez Barreto | Round 3: Ospina Castro, Santiago - Sanchez Barreto, Josue Efrain | French Defense: Rubinstein Variation, Kasparov Attack | |
| Apr 15, 2025 | Ortiz Monsalve | ½–½ | Ospina Castro | Round 2: Ortiz Monsalve, Sebastian - Ospina Castro, Santiago | French Defense: Exchange Variation | |
| Apr 14, 2025 | Ospina Castro | 1–0 | Rivera Valentin | Round 1: Ospina Castro, Santiago - Rivera Valentin, Christian Z. | Pirc Defense | |
| Dec 10, 2024 | Sanchez Riobo | * | Ospina Castro | Round 5: Sanchez Riobo, Emily Dainne - Ospina Castro, Santiago | ? | |
| Dec 10, 2024 | Ospina Castro | 1–0 | Diaz Meneses | Round 4: Ospina Castro, Santiago - Diaz Meneses, Luisa Fernanda | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 10, 2024 | Ospina Castro | * | Duque Blandon | Round 2: Ospina Castro, Santiago - Duque Blandon, Daniela | ? | |
| Dec 10, 2024 | Ospina Castro | 1–0 | Rodriguez Valencia | Round 6: Ospina Castro, Santiago - Rodriguez Valencia, Sebastian | Petrov's Defense | |
| Dec 9, 2024 | Ospina Castro | 1–0 | Duque Blandon | Round 7: Ospina Castro, Santiago - Duque Blandon, Daniela | Petrov's Defense: Kaufmann Attack | |
| Dec 9, 2024 | Londono Lopez | ½–½ | Ospina Castro | Round 6: Londono Lopez, Donaldo - Ospina Castro, Santiago | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Dec 9, 2024 | Ospina Castro | 1–0 | Marco Antonio Herrera Velasquez | Round 5: Ospina Castro, Santiago - Marco Antonio Herrera Velasquez | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 9, 2024 | Rodriguez Valencia | ½–½ | Ospina Castro | Round 4: Rodriguez Valencia, Sebastian - Ospina Castro, Santiago | Queen's Gambit Declined: Tartakower Defense | |
| Dec 9, 2024 | Ospina Castro | 1–0 | Diaz Meneses | Round 1: Ospina Castro, Santiago - Diaz Meneses, Luisa Fernanda | Caro-Kann Defense: Tartakower Variation | |
| Dec 9, 2024 | Sanchez Riobo | 0–1 | Ospina Castro | Round 2: Sanchez Riobo, Emily Dainne - Ospina Castro, Santiago | Bogo-Indian Defense: Retreat Variation | |
| Dec 9, 2024 | Ospina Castro | 1–0 | Puerta Rendon | Round 3: Ospina Castro, Santiago - Puerta Rendon, Josue | Nimzo-Larsen Attack: Classical Variation | |
| Oct 3, 2024 | Pabon Arevalo | * | Ospina Castro | Ronda 3: Pabon Arevalo, Emmanuel Alejandro - Ospina Castro, Santiago | ? | |
| Oct 3, 2024 | Ospina Castro | 1–0 | Vargas Villalobos | Ronda 14: Ospina Castro, Santiago - Vargas Villalobos, Daniel Fernando | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Oct 3, 2024 | Vargas Villalobos | 1–0 | Ospina Castro | Ronda 13: Vargas Villalobos, Daniel Fernando - Ospina Castro, Santiago | French Defense: Steiner Variation | |
| Oct 2, 2024 | Ospina Castro | 0–1 | Murillo Loreo | Ronda 11: Ospina Castro, Santiago - Murillo Loreo, Oscar Miguel | Sicilian Defense: Closed, Traditional | |
| Oct 2, 2024 | Murillo Loreo | * | Ospina Castro | Ronda 12: Murillo Loreo, Oscar Miguel - Ospina Castro, Santiago | Nimzo-Larsen Attack: Classical Variation | |
| Oct 2, 2024 | Ospina Castro | 1–0 | Toro | Ronda 10: Ospina Castro, Santiago - Toro, Miguel Angel | Zukertort Opening: Nimzo-Larsen Variation | |
| Oct 2, 2024 | Toro | ½–½ | Ospina Castro | Ronda 9: Toro, Miguel Angel - Ospina Castro, Santiago | French Defense: King's Indian Attack | |
| Oct 2, 2024 | Mora Munoz | 0–1 | Ospina Castro | Ronda 7: Mora Munoz, John Alexander - Ospina Castro, Santiago | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 2, 2024 | Ospina Castro | * | Mora Munoz | Ronda 8: Ospina Castro, Santiago - Mora Munoz, John Alexander | Sicilian Defense: Closed | |
| Oct 2, 2024 | Ospina Castro | 1–0 | Gonzalez Gutierrez | Ronda 5: Ospina Castro, Santiago - Gonzalez Gutierrez, Cesar Luis | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 2, 2024 | Gonzalez Gutierrez | 1–0 | Ospina Castro | Ronda 6: Gonzalez Gutierrez, Cesar Luis - Ospina Castro, Santiago | Sicilian Defense: Chekhover Variation | |
| Oct 2, 2024 | Ospina Castro | * | Tobar B | Ronda 4: Ospina Castro, Santiago - Tobar B, Jorge Esteban | French Defense: Exchange Variation | |
| Oct 2, 2024 | Valencia Gantiva | 1–0 | Ospina Castro | Ronda 2: Valencia Gantiva, Cristian - Ospina Castro, Santiago | Zukertort Opening: Nimzo-Larsen Variation | |
| Oct 2, 2024 | Ospina Castro | 1–0 | Valencia Gantiva | Ronda 1: Ospina Castro, Santiago - Valencia Gantiva, Cristian | Zukertort Opening: Nimzo-Larsen Variation | |
| Sep 30, 2024 | Rojas Castillo | ½–½ | Ospina Castro | Ronda 6: Rojas Castillo, Leibnitz Edison - Ospina Castro, Santiago | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Sep 30, 2024 | Ospina Castro | 1–0 | Pabon Arevalo | Ronda 5: Ospina Castro, Santiago - Pabon Arevalo, Emmanuel Alejandro | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Sep 29, 2024 | Ospina Castro | 1–0 | Delgadoro Rodallega | Ronda 3: Ospina Castro, Santiago - Delgadoro Rodallega, Erwin Damar | Caro-Kann Defense | |
| Sep 28, 2024 | Ospina Castro | 1–0 | Virviescas S | Ronda 2: Ospina Castro, Santiago - Virviescas S, Christian Stewart | Sicilian Defense: Kalashnikov Variation | |
| Sep 28, 2024 | Ospina Castro | 1–0 | Londono Lopez | Ronda 7: Ospina Castro, Santiago - Londono Lopez, Donaldo | Sicilian Defense: Moscow Variation | |
| Sep 28, 2024 | Vallejo | 0–1 | Ospina Castro | Ronda 1: Vallejo, Flavieth - Ospina Castro, Santiago | Sicilian Defense: Modern Variations | |
| Sep 25, 2024 | Valderrama Quiceno | ½–½ | Ospina Castro | Ronda 4: Valderrama Quiceno, Esteban Alb - Ospina Castro, Santiago | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Jun 2, 2024 | Johnson | 1–0 | Ospina Castro | Round 11: Johnson, Joshua - Ospina Castro, Santiago | Sicilian Defense: Richter-Rauzer Variation | |
| Jun 2, 2024 | Tobar B | ½–½ | Ospina Castro | Round 9: Tobar B, Carlos Andres - Ospina Castro, Santiago | Zukertort Opening: Nimzo-Larsen Variation | |
| Jun 2, 2024 | Jaramillo Daza | 1–0 | Ospina Castro | Round 7: Jaramillo Daza, David - Ospina Castro, Santiago | Zukertort Opening: Kingside Fianchetto | |
| Jun 2, 2024 | Ospina Castro | 1–0 | Meza Galvan | Round 8: Ospina Castro, Santiago - Meza Galvan, Luis A | Pirc Defense: Classical Variation, Quiet System | |
| Jun 2, 2024 | Ospina Castro | 0–1 | Zapata | Round 6: Ospina Castro, Santiago - Zapata, Alonso | Zukertort Opening: Nimzo-Larsen Variation | |
| Jun 1, 2024 | Ruiz Jaraba | 0–1 | Ospina Castro | Round 5: Ruiz Jaraba, Gabriel - Ospina Castro, Santiago | Sicilian Defense: Modern Variations | |
| Jun 1, 2024 | Ospina Castro | 1–0 | Pena Nieto | Round 4: Ospina Castro, Santiago - Pena Nieto, Ana Marcela | Nimzo-Larsen Attack: Classical Variation | |
| Jun 1, 2024 | Fernandez Sanchez | 1–0 | Ospina Castro | Round 3: Fernandez Sanchez, Fernando Miguel - Ospina Castro, Santiago | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jun 1, 2024 | Ospina Castro | 1–0 | Reyes Zavaleta | Round 2: Ospina Castro, Santiago - Reyes Zavaleta, Sergio Gabriel | Nimzo-Larsen Attack: Classical Variation | |
| Jun 1, 2024 | Suaza Builes | 0–1 | Ospina Castro | Round 1: Suaza Builes, Oscar A - Ospina Castro, Santiago | Queen's Pawn Game: Accelerated London System | |
| May 31, 2024 | Ospina Castro | ½–½ | Garzon Camelo | Round 10: Ospina Castro, Santiago - Garzon Camelo, Andres Santiago | Zukertort Opening: Nimzo-Larsen Variation | |
| May 30, 2024 | Alboredo | ½–½ | Ospina Castro | Round 9: Alboredo, Julia - Ospina Castro, Santiago | Sicilian Defense: Moscow Variation | |
| May 30, 2024 | Arias Gaviria | 0–1 | Ospina Castro | Round 9: Arias Gaviria, Mario Alexis - Ospina Castro, Santiago | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| May 30, 2024 | Ospina Castro | 1–0 | Cuervo Velasquez | Round 8: Ospina Castro, Santiago - Cuervo Velasquez, Juan Manuel | Zukertort Opening: Nimzo-Larsen Variation | |
| May 30, 2024 | Santos Flores | 1–0 | Ospina Castro | Round 7: Santos Flores, Alberto - Ospina Castro, Santiago | French Defense: Rubinstein Variation, Blackburne Defense | |
| May 30, 2024 | Ospina Castro | ½–½ | Gallego | Round 6: Ospina Castro, Santiago - Gallego, Julian Andres | Zukertort Opening: Nimzo-Larsen Variation | |
| May 30, 2024 | Reinhard Pinto | 0–1 | Ospina Castro | Round 5: Reinhard Pinto, Dietmar - Ospina Castro, Santiago | French Defense: Exchange Variation | |
| May 30, 2024 | Ospina Castro | 0–1 | Cadena M | Round 4: Ospina Castro, Santiago - Cadena M, Gustavo Adolfo | Zukertort Opening: Nimzo-Larsen Variation | |