| Jan 9, 2026 | Giron Chavez | 1–0 | Cordero Medrano | Tercer Torneo Internacional Club Caissa Guatemala | Queen's Pawn Game: Stonewall Attack | |
| Oct 6, 2025 | Novoa Fuentes | 1–0 | Cordero Medrano | Ronda 4: Novoa Fuentes, Mateo Alberto - Cordero Medrano, Dennis Matheus | Queen's Gambit Declined: Marshall Defense | |
| Oct 6, 2025 | Cordero Medrano | ½–½ | Fabrega Van Der Laat | Ronda 3: Cordero Medrano, Dennis Matheus - Fabrega Van Der Laat, Jose Bernardo | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Oct 5, 2025 | Perez Wong | 1–0 | Cordero Medrano | Ronda 2: Perez Wong, Liang Noel - Cordero Medrano, Dennis Matheus | Rapport-Jobava System | |
| Oct 5, 2025 | Cordero Medrano | 0–1 | Marin Vargas | Ronda 1: Cordero Medrano, Dennis Matheus - Marin Vargas, Aaron | Owen Defense | |
| Oct 5, 2025 | Cordero Medrano | 1–0 | Murillo Rodriguez | Ronda 5: Cordero Medrano, Dennis Matheus - Murillo Rodriguez, Javier Alejandro | Sicilian Defense: Najdorf Variation | |
| Oct 4, 2025 | Cordero Medrano | 1–0 | Villegas Linares | Ronda 4: Cordero Medrano, Dennis Matheus - Villegas Linares, Carlos Daniel | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 4, 2025 | Puerto | 0–1 | Cordero Medrano | Ronda 3: Puerto, Victor - Cordero Medrano, Dennis Matheus | Queen's Gambit Declined: Baltic Defense | |
| Oct 4, 2025 | Oses Gonzalez | 1–0 | Cordero Medrano | Ronda 5: Oses Gonzalez, Luis David - Cordero Medrano, Dennis Matheus | Queen's Gambit Declined: Baltic Defense | |
| Oct 4, 2025 | Cordero Medrano | ½–½ | Gonzalez Aguero | Ronda 2: Cordero Medrano, Dennis Matheus - Gonzalez Aguero, Julian | Modern Defense: Standard Defense | |
| Oct 4, 2025 | Cordero Medrano | 1–0 | Gaitan Valle | Ronda 1: Cordero Medrano, Dennis Matheus - Gaitan Valle, Jhafet Eleazar | Sicilian Defense: Accelerated Dragon | |
| Oct 3, 2025 | Cordero Medrano | 0–1 | Caceres Giron | Ronda 5: Cordero Medrano, Dennis Matheus - Caceres Giron, Moises | Philidor Defense | |
| Oct 3, 2025 | Oviedo Rocha | 0–1 | Cordero Medrano | Ronda 4: Oviedo Rocha, Mateo Javier - Cordero Medrano, Dennis Matheus | French Defense: Classical Variation, Pollock Variation | |
| Oct 3, 2025 | Cordero Medrano | 0–1 | Herrera Carmona | Ronda 3: Cordero Medrano, Dennis Matheus - Herrera Carmona, Jhoel | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 3, 2025 | Rodriguez Diaz | 0–1 | Cordero Medrano | Ronda 2: Rodriguez Diaz, Cristhian David - Cordero Medrano, Dennis Matheus | French Defense: Advance Variation, Milner-Barry Gambit | |
| Oct 3, 2025 | Cordero Medrano | 1–0 | Alfaro | Ronda 1: Cordero Medrano, Dennis Matheus - Alfaro, Daniel Eli | Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation | |
