| Jul 18, 2026 | Errazola | 1–0 | Hiriart | Round 9: Errazola, Mauricio - Hiriart, Guillermo | Zukertort Opening: Nimzo-Larsen Variation | |
| Jul 18, 2026 | Hiriart | 0–1 | Carbone | Round 8: Hiriart, Guillermo - Carbone, Diego | Sicilian Defense: Bowdler Attack | |
| Jul 18, 2026 | Salguero | 0–1 | Hiriart | Round 7: Salguero, Rafael - Hiriart, Guillermo | Indian Defense: Normal Variation | |
| Jul 17, 2026 | Hiriart | 1–0 | Roselli | Round 6: Hiriart, Guillermo - Roselli, Juan Pablo | Bishop's Opening: Berlin Defense | |
| Jul 17, 2026 | Hiriart | 0–1 | Cayetano | Round 4: Hiriart, Guillermo - Cayetano, Juan | French Defense: Steinitz Attack | |
| Jul 17, 2026 | Hiriart | 0–1 | Granara Barreto | Round 2: Hiriart, Guillermo - Granara Barreto, Sebastian | Caro-Kann Defense: Hillbilly Attack | |
| Jun 21, 2026 | Carbone | 1–0 | Hiriart | Round 9: Carbone, Diego - Hiriart, Guillermo | Catalan Opening: Closed | |
| Jun 21, 2026 | Piriz | 1–0 | Hiriart | Round 6: Piriz, Facundo - Hiriart, Guillermo | Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line | |
| Jun 21, 2026 | Hiriart | ½–½ | Casas | Round 4: Hiriart, Guillermo - Casas, Nicolas | London System | |
| Jun 21, 2026 | Altesor | 1–0 | Hiriart | Round 3: Altesor, Caterina - Hiriart, Guillermo | Caro-Kann Defense: Classical Variation | |
| Jun 21, 2026 | Hiriart | 0–1 | Davila Texeira | Round 2: Hiriart, Guillermo - Davila Texeira, Mario | Bishop's Opening | |
| Jun 21, 2026 | Laurens | 0–1 | Hiriart | Round 1: Laurens, Roberto - Hiriart, Guillermo | Nimzo-Indian Defense: Leningrad Variation | |
| Jun 7, 2026 | Kulik | 1–0 | Hiriart | Round 4: Kulik, Nicolas - Hiriart, Guillermo | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jul 19, 2024 | Damonte | 0–1 | Hiriart | Round 1: Damonte, Fernando - Hiriart, Guillermo | Dutch Defense: Rubinstein Variation | |