| Apr 3, 2026 | Costalonga | ½–½ | Brilej | Grenke Chess Festival 2026 Open | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 7, 2025 | Costalonga | 1–0 | Rindone | Round 5: Costalonga, Riccardo - Rindone, Andrea | Four Knights Game: Gunsberg Variation | |
| Dec 7, 2025 | Costalonga | * | Mazzotti | Round 3: Costalonga, Riccardo - Mazzotti, Filippo | ? | |
| Dec 6, 2025 | Sergi | 0–1 | Costalonga | Round 2: Sergi, Alessandro - Costalonga, Riccardo | Sicilian Defense: Closed | |
| Dec 6, 2025 | Costalonga | 1–0 | Grosso | Round 1: Costalonga, Riccardo - Grosso, Emanuele | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Nov 28, 2025 | Costalonga | ½–½ | Liloni | Round 7: Costalonga, Riccardo - Liloni, Francesco Mattia | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 28, 2025 | Pernigotti | ½–½ | Costalonga | Round 4: Pernigotti, Jacopo - Costalonga, Riccardo | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Nov 28, 2025 | Di Bartolomeo | ½–½ | Costalonga | Round 6: Di Bartolomeo, Adrian Mikail - Costalonga, Riccardo | Van't Kruijs Opening | |
| Sep 21, 2025 | Costalonga | 0–1 | Godena | Round 2: Costalonga, Riccardo - Godena, Michele | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Aug 23, 2024 | Simonelli | ½–½ | Costalonga | Round 9: Simonelli, Mattia - Costalonga, Riccardo | Catalan Opening: Closed | |
| Aug 22, 2024 | Bonade | ½–½ | Costalonga | Round 8: Bonade, Massimo - Costalonga, Riccardo | Sicilian Defense: Four Knights Variation | |
| Aug 18, 2024 | Costalonga | 0–1 | Mammi | Round 3: Costalonga, Riccardo - Mammi, Samuele | Caro-Kann Defense: Apocalypse Attack | |
| Aug 17, 2024 | Shoshin | 1–0 | Costalonga | Round 1: Shoshin, Kirill - Costalonga, Riccardo | King's Indian Defense: Makogonov Variation | |
| Jul 6, 2024 | Fulgentini | 0–1 | Costalonga | Round 9: Fulgentini, Edoardo - Costalonga, Riccardo | Sicilian Defense: French Variation | |
| Jul 5, 2024 | Costalonga | ½–½ | Grassi | Round 8: Costalonga, Riccardo - Grassi, Sebastiano | London System | |
| Jul 4, 2024 | Di Liberto | ½–½ | Costalonga | Round 7: Di Liberto, Michele - Costalonga, Riccardo | Sicilian Defense: French Variation, Normal | |
| Jul 3, 2024 | Costalonga | 1–0 | Pernigotti | Round 6: Costalonga, Riccardo - Pernigotti, Jacopo | French Defense: Paulsen Variation | |
| Jul 2, 2024 | Marchenkov | 0–1 | Costalonga | Round 5: Marchenkov, Lorenzo - Costalonga, Riccardo | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jul 1, 2024 | Costalonga | 1–0 | Zanzottera | Round 4: Costalonga, Riccardo - Zanzottera, Lorenzo | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Jul 1, 2024 | CABRAS SANNA RUBEN | 0–1 | Costalonga | Round 3: CABRAS SANNA RUBEN - Costalonga, Riccardo | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jun 30, 2024 | Costalonga | 1–0 | Klishchevskyi | Round 2: Costalonga, Riccardo - Klishchevskyi, Matvii | Four Knights Game: Gunsberg Variation | |
| Jun 29, 2024 | Bongiovanni | 0–1 | Costalonga | Round 1: Bongiovanni, Mirko - Costalonga, Riccardo | Sicilian Defense: Modern Variations | |
| May 26, 2024 | De Filomeno | 1–0 | Costalonga | Round 7: De Filomeno, Simone - Costalonga, Riccardo | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| May 26, 2024 | Tirelli | 1–0 | Costalonga | Round 3: Tirelli, Mauro - Costalonga, Riccardo | Sicilian Defense: French Variation, Normal | |
| May 26, 2024 | Costalonga | ½–½ | Favaloro | Round 2: Costalonga, Riccardo - Favaloro, Andrea | Scandinavian Defense: Mieses-Kotroc Variation | |
| May 25, 2024 | Motola | 1–0 | Costalonga | Round 6: Motola, Jacopo - Costalonga, Riccardo | Tarrasch Defense: Symmetrical Variation | |
| May 25, 2024 | Costalonga | 0–1 | Mola | Round 4: Costalonga, Riccardo - Mola, Pietro | Four Knights Game: Gunsberg Variation | |
| May 25, 2024 | Costalonga | 0–1 | Di Benedetto | Round 2: Costalonga, Riccardo - Di Benedetto, Edoardo | French Defense: Steinitz Variation, Boleslavsky Variation | |