| Nov 11, 2023 | Lucas Costamilan Tomiello | 1–0 | Ivan Excender Soriano Quispe | Round 9: Lucas Costamilan Tomiello - Ivan Excender Soriano Quispe | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Nov 10, 2023 | Juan Martin Ibarra | 0–1 | Lucas Costamilan Tomiello | Round 8: Juan Martin Ibarra - Lucas Costamilan Tomiello | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Nov 10, 2023 | Diego Saul Rodri Flores Quillas | ½–½ | Lucas Costamilan Tomiello | Round 7: Diego Saul Rodri Flores Quillas - Lucas Costamilan Tomiello | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Nov 9, 2023 | Lucas Costamilan Tomiello | 1–0 | Henry Richard Vasquez Vargas | Round 6: Lucas Costamilan Tomiello - Henry Richard Vasquez Vargas | Alekhine Defense: Four Pawns Attack, Fianchetto Variation | |
| Nov 8, 2023 | Lucas Costamilan Tomiello | 1–0 | Lucas Fonseca Piccoli | Round 5: Lucas Costamilan Tomiello - Lucas Fonseca Piccoli | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Nov 6, 2023 | Lucas Costamilan Tomiello | 0–1 | Pablo Castro Salgado | Round 2: Lucas Costamilan Tomiello - Pablo Castro Salgado | Bishop's Opening: Vienna Hybrid, Spielmann Attack | |
| Sep 22, 2023 | Henry Vasquez Vargas | ½–½ | Lucas Costamilan Tomiello | Round 9: Henry Vasquez Vargas - Lucas Costamilan Tomiello | Indian Defense: Anti-Nimzo-Indian | |
| Sep 20, 2023 | Osvaldo Zambrana | 1–0 | Lucas Costamilan Tomiello | Round 7: Osvaldo Zambrana - Lucas Costamilan Tomiello | Sicilian Defense: Lasker-Pelikan Variation | |
| Sep 19, 2023 | Gianmarco Leiva | ½–½ | Lucas Costamilan Tomiello | Round 6: Gianmarco Leiva - Lucas Costamilan Tomiello | King's Indian Attack | |
| Sep 18, 2023 | Lucas Costamilan Tomiello | ½–½ | Deivy Vera | Round 5: Lucas Costamilan Tomiello - Deivy Vera | Bishop's Opening: Vienna Hybrid | |
| Sep 17, 2023 | Lucas Costamilan Tomiello | 1–0 | Sergio Barrientos | Round 4: Lucas Costamilan Tomiello - Sergio Barrientos | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jul 15, 2023 | Lucas Costamilan Tomiello | 0–1 | Nathan Felipe Filgueiras | Round 9: Lucas Costamilan Tomiello - Nathan Felipe Filgueiras | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Jul 15, 2023 | Lucas Costamilan Tomiello | 1–0 | Leonardo Ballesteros Cardenas | Round 8: Lucas Garmendia Vega - Leonardo Ballesteros Cardenas | Caro-Kann Defense: Tartakower Variation | |
| Jul 14, 2023 | Mauricio Emmanuel Marrujo Pardo | 0–1 | Lucas Costamilan Tomiello | Round 7: Mauricio Emmanuel Marrujo Pardo - Lucas Costamilan Tomiello | Sicilian Defense: Moscow Variation | |
| Jul 13, 2023 | Lucas Costamilan Tomiello | 1–0 | Daniel Titichoca Daza | Round 6: Lucas Costamilan Tomiello - Daniel Titichoca Daza | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jul 12, 2023 | Mateus Costamilan Tomiello | ½–½ | Lucas Costamilan Tomiello | Round 5: Mateus Costamilan Tomiello - Lucas Costamilan Tomiello | Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense | |
| Jul 12, 2023 | Lucas Costamilan Tomiello | ½–½ | Joaquin Ignacio Miranda Camus | Round 4: Lucas Costamilan Tomiello - Joaquin Ignacio Miranda Camus | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jul 11, 2023 | Marcelo Orrego Palermo | 0–1 | Lucas Costamilan Tomiello | Round 3: Marcelo Orrego Palermo - Lucas Costamilan Tomiello | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 11, 2023 | Lucas Costamilan Tomiello | ½–½ | Gonzalo Andres Gomez Barrera | Round 2: Lucas Costamilan Tomiello - Gonzalo Andres Gomez Barrera | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jul 10, 2023 | Martin Andrei Gasic Merino | 0–1 | Lucas Costamilan Tomiello | Round 1: Martin Andrei Gasic Merino - Lucas Costamilan Tomiello | Indian Defense: Tartakower Attack | |
| Jan 27, 2023 | Lucas Costamilan Tomiello | * | Diego Rafael Di Berardino | Round 8: Lucas Costamilan Tomiello - Diego Rafael Di Berardino | Bogo-Indian Defense: Wade-Smyslov Variation | |
