| Jun 27, 2026 | Castellanos | 0–1 | Hernandez Arias | Round 7: Castellanos, Juan Jose - Hernandez Arias, Samuel | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 27, 2026 | Gomez Calderon | ½–½ | Castellanos | Round 6: Gomez Calderon, Sebastian - Castellanos, Juan Jose | Sicilian Defense: French Variation | |
| Jun 20, 2026 | Gutierrez Vera | 1–0 | Castellanos | Round 7: Gutierrez Vera, Erick Sneider - Castellanos, Juan Jose | Sicilian Defense | |
| Jun 20, 2026 | Castellanos | 0–1 | Alejandro Pardo Castillo | Round 6: Castellanos, Juan Jose - Alejandro Pardo Castillo | East Indian Defense | |
| Jun 20, 2026 | Martinez Russi | 1–0 | Castellanos | Round 5: Martinez Russi, Tygua Lautaro - Castellanos, Juan Jose | Queen's Pawn Game | |
| Jun 20, 2026 | Castellanos | 0–1 | Murcia Molina | Round 4: Castellanos, Juan Jose - Murcia Molina, Manuel Hernando | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 20, 2026 | Salazar Cardenas | 1–0 | Castellanos | Round 3: Salazar Cardenas, Cesar David - Castellanos, Juan Jose | Indian Defense: Przepiorka Variation | |
| Jun 20, 2026 | Castellanos | 1–0 | Luis Fernando Tobian | Round 2: Castellanos, Juan Jose - Luis Fernando Tobian | Pirc Defense | |
| Jun 20, 2026 | Ponton Carvajal | 1–0 | Castellanos | Round 1: Ponton Carvajal, Cristian David - Castellanos, Juan Jose | King's Indian Defense: Semi-Classical Variation | |
| May 24, 2026 | Joan Alexis Garcia Quiroga | 0–1 | Castellanos | Round 7: Joan Alexis Garcia Quiroga - Castellanos, Juan Jose | Sicilian Defense: Modern Variations | |
| May 24, 2026 | Castellanos | 0–1 | Guerrero | Round 6: Castellanos, Juan Jose - Guerrero, Javier Eduardo | Sicilian Defense: Dragon Variation, Yugoslav Attack | |
| May 24, 2026 | Cortes | 1–0 | Castellanos | Round 5: Cortes, Emanuel - Castellanos, Juan Jose | Sicilian Defense: McDonnell Attack | |
| May 24, 2026 | Paez Rubio | 1–0 | Castellanos | Round 3: Paez Rubio, Hollman - Castellanos, Juan Jose | Sicilian Defense: Bowdler Attack | |
| May 24, 2026 | Castellanos | 0–1 | Vargas Castro | Round 2: Castellanos, Juan Jose - Vargas Castro, Juan Diego | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| May 24, 2026 | Ramirez Beltran | 0–1 | Castellanos | Round 1: Ramirez Beltran, Francisco Javier - Castellanos, Juan Jose | ? | |
| Apr 20, 2026 | Castellanos | ½–½ | Fonseca Guarin | Round 7: Castellanos, Juan Jose - Fonseca Guarin, John Henry | French Defense: Advance Variation, Paulsen Attack | |
| Apr 20, 2026 | Johnny Steven Zamora Martinez | ½–½ | Castellanos | Round 6: Johnny Steven Zamora Martinez - Castellanos, Juan Jose | Indian Defense: Accelerated London System | |
| Apr 20, 2026 | Castellanos | 0–1 | Becerra | Round 5: Castellanos, Juan Jose - Becerra, Sergio | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| Apr 20, 2026 | Juan Esteban Huerfano Rico | 0–1 | Castellanos | Round 4: Juan Esteban Huerfano Rico - Castellanos, Juan Jose | Ware Opening: Crab Variation | |
| Apr 20, 2026 | Giraldo Castano | * | Castellanos | Round 2: Giraldo Castano, Miguel - Castellanos, Juan Jose | ? | |
| Apr 20, 2026 | Castellanos | 0–1 | Murcia Molina | Round 3: Castellanos, Juan Jose - Murcia Molina, Manuel Hernando | Sicilian Defense: Scheveningen Variation, English Attack, with f3 | |
| Apr 19, 2026 | Castellanos | 0–1 | Lopez Ramirez | Round 1: Castellanos, Juan Jose - Lopez Ramirez, Jorge Hernan | Ruy Lopez: Schliemann Defense, Jaenisch Gambit Accepted | |
| Mar 28, 2026 | Castellanos | 0–1 | Salazar Castelblanco | Round 6: Castellanos, Juan Jose - Salazar Castelblanco, Francisco Javier | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Mar 28, 2026 | Yeomans Luna | 1–0 | Castellanos | Round 5: Yeomans Luna, Elsie Maribel - Castellanos, Juan Jose | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Mar 28, 2026 | Rodriguez Sanchez | 1–0 | Castellanos | Round 1: Rodriguez Sanchez, Diego Eduardo - Castellanos, Juan Jose | Indian Defense: Accelerated London System | |
| Mar 23, 2026 | Castellanos | 1–0 | Jimenez Escobar | Round 7: Castellanos, Juan Jose - Jimenez Escobar, Sebastian Andres | Sicilian Defense: Old Sicilian | |
| Mar 23, 2026 | Gurrute Samboni | 1–0 | Castellanos | Round 6: Gurrute Samboni, Samuel Josue - Castellanos, Juan Jose | Sicilian Defense: Modern Variations | |
| Mar 22, 2026 | Castellanos | 1–0 | Miguel Angel Medrano Cardenas | Round 5: Castellanos, Juan Jose - Miguel Angel Medrano Cardenas | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Mar 22, 2026 | Barrios Gonzalez | 1–0 | Castellanos | Round 4: Barrios Gonzalez, Federico - Castellanos, Juan Jose | Sicilian Defense: Modern Variations | |
| Mar 22, 2026 | Castellanos | 0–1 | Morales Aldana | Round 3: Castellanos, Juan Jose - Morales Aldana, David Alejandro | Sicilian Defense: Kan Variation, Knight Variation | |
| Mar 20, 2026 | Castellanos | 0–1 | Comas Bermeo | Round 1: Castellanos, Juan Jose - Comas Bermeo, Emilie | Ruy Lopez: Berlin Defense, Beverwijk Variation | |