| Feb 7, 2026 | Munoz Venegas | ½–½ | Chacon Olortegui | Ronda 8: Munoz Venegas, Vicente - Chacon Olortegui, Steven Anton | Sicilian Defense: Kalashnikov Variation | |
| Feb 7, 2026 | Araneda Alcaino | ½–½ | Chacon Olortegui | Ronda 7: Araneda Alcaino, Arturo Nicolas - Chacon Olortegui, Steven Anton | Sicilian Defense: Closed, Fianchetto Variation | |
| Feb 5, 2026 | Larranaga Arriagada | 1–0 | Chacon Olortegui | Ronda 4: Larranaga Arriagada, Emilio Alon - Chacon Olortegui, Steven Anton | Sicilian Defense: Old Sicilian | |
| Jan 31, 2026 | Pereyra | 1–0 | Chacon Olortegui | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Nimzo-Larsen Attack: Classical Variation | |
| Jan 31, 2026 | Chacon Olortegui | ½–½ | Montero Martinez | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Pirc Defense | |
| Jan 30, 2026 | Peralta Saldias | 0–1 | Chacon Olortegui | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Réti Opening: Anglo-Slav Variation, Gurevich System | |
| Jan 29, 2026 | Chacon Olortegui | 0–1 | Guerrero Cataldo | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Sicilian Defense: Closed | |
| Jan 29, 2026 | Meneses Mesa | 0–1 | Chacon Olortegui | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Sicilian Defense: Old Sicilian | |
| Jan 26, 2026 | Gutierrez Montes | 1–0 | Chacon Olortegui | I CHESS OPEN SANTIAGO 2026 - CLUB DE AJEDREZ DE CHILE | Sicilian Defense: Closed, Traditional | |
| Jan 14, 2026 | Fuenzalida Orellana | 1–0 | Chacon Olortegui | III Itt Temuco 2026 | Queen's Pawn Game: Accelerated London System | |
| Jan 12, 2026 | Miranda Gatica | 1–0 | Chacon Olortegui | III Itt Temuco 2026 | Sicilian Defense: Kalashnikov Variation | |
| Jan 11, 2026 | Bahamondes Ortiz | 1–0 | Chacon Olortegui | III Itt Temuco 2026 | Slav Defense: Three Knights Variation | |
| Jan 11, 2026 | Chacon Olortegui | 1–0 | Contreras Alarcon | III Itt Temuco 2026 | Sicilian Defense: Closed | |
| Jan 11, 2026 | Gonzalez Gonzalez | ½–½ | Chacon Olortegui | III Itt Temuco 2026 | Slav Defense: Quiet Variation, Schallopp Defense | |
| Jan 10, 2026 | Chacon Olortegui | 0–1 | Tokman | III Itt Temuco 2026 | Caro-Kann Defense: Exchange Variation | |
| Jan 9, 2026 | Cruz | 0–1 | Chacon Olortegui | III Itt Temuco 2026 | ? | |
| Oct 5, 2025 | Chacon Olortegui | ½–½ | Huichicoy Gonzalez | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Closed | |
| Oct 5, 2025 | Pereira Cid | 1–0 | Chacon Olortegui | 12 CHESS BOSS - CHESS TOUR GRUPO C | Slav Defense: Soultanbeieff Variation | |
| Oct 5, 2025 | Candia Gomez | ½–½ | Chacon Olortegui | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Closed, Traditional | |
| Oct 4, 2025 | Chacon Olortegui | 0–1 | Rubio Bascur | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Closed, Botvinnik Defense, with Nge2 | |
| Oct 4, 2025 | Chacon Olortegui | 1–0 | Munoz Venegas | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Closed | |
| Oct 4, 2025 | Miranda Gatica | 1–0 | Chacon Olortegui | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Old Sicilian | |
| Oct 3, 2025 | Melin Contreras | 1–0 | Chacon Olortegui | 12 CHESS BOSS - CHESS TOUR GRUPO C | Sicilian Defense: Closed | |
| Jul 5, 2025 | Chacon Olortegui | * | Larranaga Arriagada | Sudamericano Escolar Categorias Impares | King's Pawn Game | |
| Jul 5, 2025 | Chacon Olortegui | 1–0 | Larranaga Arriagada | Sudamericano Escolar Categorias Impares | Sicilian Defense: Closed, Chameleon Variation | |
| Jul 4, 2025 | Aristizabal Melguiso | 1–0 | Chacon Olortegui | Sudamericano Escolar Categorias Impares | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jul 4, 2025 | Chacon Olortegui | 1–0 | Gomez Silva | Sudamericano Escolar Categorias Impares | French Defense: Exchange Variation | |
| Jul 3, 2025 | Araneda Alcaino | 0–1 | Chacon Olortegui | Sudamericano Escolar Categorias Impares | Sicilian Defense: Closed, Fianchetto Variation | |
| Jul 2, 2025 | Chacon Olortegui | 0–1 | Escobar Castro | Sudamericano Escolar Categorias Impares | Sicilian Defense: Closed | |
| Jul 2, 2025 | Chacon Olortegui | 1–0 | Diaz Rosas | Sudamericano Escolar Categorias Impares | Italian Game: Giuoco Piano | |
| May 25, 2025 | Chacon Olortegui | ½–½ | Munoz Venegas | Ronda 7: Chacon Olortegui, Steven Anton - Munoz Venegas, Vicente | Sicilian Defense: Closed | |
| May 25, 2025 | Chacon Olortegui | 1–0 | Torres Lagos | Ronda 6: Chacon Olortegui, Steven Anton - Torres Lagos, Matias Alberto | Sicilian Defense: Closed, Chameleon Variation | |
| May 24, 2025 | Brunstein Hauyon | ½–½ | Chacon Olortegui | Ronda 5: Brunstein Hauyon, Felipe - Chacon Olortegui, Steven Anton | Queen's Pawn Game: London System | |
| May 24, 2025 | Chacon Olortegui | ½–½ | Escobar Castro | Ronda 4: Chacon Olortegui, Steven Anton - Escobar Castro, Franco Alessandro | Sicilian Defense: Closed | |
| Feb 8, 2025 | Chacon Olortegui | 0–1 | Belmar Obreque | Ronda 7: Chacon Olortegui, Steven Anton - Belmar Obreque, Jorge | Modern Defense: Two Knights Variation | |
| Feb 5, 2025 | Rubio Bascur | ½–½ | Chacon Olortegui | Ronda 3: Rubio Bascur, Sebastian Alfonso - Chacon Olortegui, Steven Anton | Réti Opening | |
| Aug 1, 2024 | Chacon Olortegui | 0–1 | Bulgarini Torre | CLUB AJEDREZ CHILE TORNEO IRT SUB 2400 AGOSTO 2024 | ? | |
| Jun 26, 2024 | Candia Gomez | 1–0 | Chacon Olortegui | Round 5: Candia Gomez, Matias Vicente - Chacon Olortegui, Steven Anton | Van Geet Opening: Grünfeld Defense | |
| May 21, 2024 | Chacon Olortegui | 0–1 | Marquez Rosas | Round 8: Chacon Olortegui, Steven Anton - Marquez Rosas, Vicente | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |