| Jun 26, 2026 | Chiari | 1–0 | Gerri | Round 11: Chiari, Cosimo - Gerri, Francesco | Catalan Opening: Closed | |
| Jun 25, 2026 | Voskolovich | 1–0 | Chiari | Round 10: Voskolovich, Bogdan - Chiari, Cosimo | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Jun 24, 2026 | Theodoridis | 1–0 | Chiari | Round 9: Theodoridis, Charalampos - Chiari, Cosimo | English Opening: Four Knights System, Nimzowitsch Variation | |
| Jun 23, 2026 | Chiari | 1–0 | Hsin | U16 Open | Catalan Opening: Closed | |
| Jun 22, 2026 | Wu Zeyin | 0–1 | Chiari | Round 7: Wu Zeyin - Chiari, Cosimo | London System | |
| Jun 20, 2026 | Chiari | 0–1 | Malhotra | Round 6: Chiari, Cosimo - Malhotra, Rehaan | Caro-Kann Defense: Exchange Variation | |
| Jun 19, 2026 | Dotzer | 1–0 | Chiari | Round 5: Dotzer, Lukas - Chiari, Cosimo | Queen's Gambit Accepted: Normal Variation | |
| Jun 18, 2026 | Chiari | ½–½ | Hung | Round 4: Chiari, Cosimo - Hung, Shao-Yen | Slav Defense: Breyer Variation | |
| Jun 17, 2026 | Boutikos | 1–0 | Chiari | Round 3: Boutikos, Eleftherios - Chiari, Cosimo | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 16, 2026 | Chiari | 1–0 | Rosano | Round 2: Chiari, Cosimo - Rosano, Francesco | Benoni Defense | |
| Jun 15, 2026 | Gkavardinas | 1–0 | Chiari | Round 1: Gkavardinas, Antonios - Chiari, Cosimo | Sicilian Defense: Najdorf Variation, English Attack | |
| Apr 6, 2026 | Graziani | 0–1 | Chiari | Round 6: Graziani, Emma - Chiari, Cosimo | Sicilian Defense: Hyperaccelerated Dragon | |
| Apr 4, 2026 | Chiari | 0–1 | Chieppa | Round 3: Chiari, Cosimo - Chieppa, Giuseppe | King's Indian Defense: Makogonov Variation | |
| Apr 4, 2026 | Botta | 1–0 | Chiari | Round 2: Botta, Massimiliano - Chiari, Cosimo | Queen's Gambit Accepted: Alekhine Defense | |
| Mar 1, 2026 | Chiari | 1–0 | Tondi | Round 5: Chiari, Cosimo - Tondi, Aurelio | King's Indian Defense: Makogonov Variation | |
| Mar 1, 2026 | Nardoni | 1–0 | Chiari | Round 4: Nardoni, Matteo - Chiari, Cosimo | Sicilian Defense: Scheveningen Variation, English Attack, with f3 | |
| Feb 28, 2026 | Chiari | 0–1 | Caprio | Round 3: Chiari, Cosimo - Caprio, Guido | Benoni Defense: Fianchetto Variation | |
| Feb 28, 2026 | Pin | 0–1 | Chiari | Round 2: Pin, Orlando - Chiari, Cosimo | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Feb 27, 2026 | Chiari | 0–1 | Mammi | Round 1: Chiari, Cosimo - Mammi, Ottavio | Queen's Gambit Declined | |
| Feb 14, 2026 | Di Liberto | ½–½ | Chiari | Round 9 Finals: Di Liberto, Michele - Chiari, Cosimo | Sicilian Defense: Najdorf Variation | |
| Feb 14, 2026 | Chiari | ½–½ | Di Liberto | Round 8 Finals: Chiari, Cosimo - Di Liberto, Michele | Catalan Opening | |
| Feb 13, 2026 | Chiari | ½–½ | Pin | Round 7 SemiFinals: Chiari, Cosimo - Pin, Orlando | Catalan Opening: Open Defense, Classical Line | |
| Feb 13, 2026 | Pin | 0–1 | Chiari | Round 6 SemiFinals: Pin, Orlando - Chiari, Cosimo | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Feb 12, 2026 | Chiari | 1–0 | Alessi | Round 5: Chiari, Cosimo - Alessi, Clio | Catalan Opening: Closed, Main Line | |
| Feb 12, 2026 | Viti | 0–1 | Chiari | Round 4: Viti, Greta - Chiari, Cosimo | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Feb 12, 2026 | Chiari | 0–1 | Vincenti | Round 3: Chiari, Cosimo - Vincenti, Leonardo | Catalan Opening: Open Defense | |
| Feb 11, 2026 | Di Liberto | ½–½ | Chiari | Round 2: Di Liberto, Michele - Chiari, Cosimo | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Feb 11, 2026 | Fulgentini | 1–0 | Chiari | Round 1: Fulgentini, Edoardo - Chiari, Cosimo | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| Nov 16, 2025 | Chiari | 0–1 | Pin | Round 5: Chiari, Cosimo - Pin, Orlando | Catalan Opening: Open Defense, Classical Line | |
| Nov 16, 2025 | Chiari | ½–½ | Vuelban | Round 4: Chiari, Cosimo - Vuelban, Virgilio | King's Indian Defense: Makogonov Variation | |
| Nov 15, 2025 | Calvigioni | 0–1 | Chiari | Round 2: Calvigioni, Matteo - Chiari, Cosimo | Queen's Pawn Game: Colle System | |
| Nov 14, 2025 | Chiari | 1–0 | Colombini | Round 1: Chiari, Cosimo - Colombini, Lucio | Mikenas Defense | |
| Nov 14, 2025 | Natoli | 1–0 | Chiari | Round 3: Natoli, Alessia - Chiari, Cosimo | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Jul 4, 2025 | Chiari | 1–0 | Unterweger | Round 8: Chiari, Cosimo - Unterweger, Jonas | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jul 3, 2025 | Codecasa | 0–1 | Chiari | Round 7: Codecasa, Alessandro - Chiari, Cosimo | Queen's Gambit Accepted | |
| Jul 2, 2025 | Chiari | 1–0 | Bonvino | Round 6: Chiari, Cosimo - Bonvino, Gianluigi | Catalan Opening: Open Defense | |
| Jun 30, 2025 | Chiari | 0–1 | Pallini | Round 4: Chiari, Cosimo - Pallini, Tommaso | King's Indian Defense: Fianchetto Variation, Classical Fianchetto | |
| Jun 28, 2025 | Chiari | 1–0 | Pulvirenti | Round 9: Chiari, Cosimo - Pulvirenti, Davide | Queen's Gambit Declined | |
| Feb 16, 2025 | Chiari | 0–1 | Fulgentini | Round 5: Chiari, Cosimo - Fulgentini, Edoardo | Catalan Opening: Open Defense, Classical Line | |
| Feb 16, 2025 | Pin | ½–½ | Chiari | Round 4: Pin, Orlando - Chiari, Cosimo | Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation | |
| Feb 15, 2025 | Chiari | 1–0 | Viti | Round 3: Chiari, Cosimo - Viti, Greta | Slav Defense: Breyer Variation | |
| Feb 15, 2025 | D`ippolito | 1–0 | Chiari | Round 2: D`ippolito, Nilo Alessandro - Chiari, Cosimo | Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation | |
| Feb 14, 2025 | Chiari | 0–1 | Frigerio | Round 1: Chiari, Cosimo - Frigerio, Riccardo | Indian Defense: King's Indian Variation, Fianchetto Variation | |
| Jul 6, 2024 | Chiari | 1–0 | Bahnareanu | Round 9: Chiari, Cosimo - Bahnareanu, Gabriel | Catalan Opening: Closed | |
| Jul 1, 2024 | Cavaler | 1–0 | Chiari | Round 3: Cavaler, Alessandro - Chiari, Cosimo | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Mar 29, 2024 | Simonetto | 1–0 | Chiari | Round 1: Simonetto, Andrea - Chiari, Cosimo | Caro-Kann Defense: Panov Attack, Main Line | |