| Jul 6, 2023 | Edgardo J. Almedina Ortiz | 0–1 | Nathaniel Mathurin | Round 15: Edgardo J. Almedina Ortiz - Nathaniel Mathurin | Nimzo-Indian Defense: Classical Variation, Keres Defense | |
| Jul 6, 2023 | Nathaniel Mathurin | 1–0 | Jorge Luis Baules Rodriguez | Round 14: Nathaniel Mathurin - Jorge Luis Baules Rodriguez | Sicilian Defense: Moscow Variation, Main Line | |
| Jul 6, 2023 | Davidson Gabriel | 1–0 | Nathaniel Mathurin | Round 13: Davidson Gabriel - Nathaniel Mathurin | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Jul 6, 2023 | Nathaniel Mathurin | 0–1 | Orlando Husbands | Round 12: Nathaniel Mathurin - Orlando Husbands | Réti Opening: Advance Variation | |
| Jul 6, 2023 | Nathaniel Mathurin | 0–1 | Joshua Christie | Round 11: Nathaniel Mathurin - Joshua Christie | Bogo-Indian Defense: Grünfeld Variation | |
| Jul 6, 2023 | Ricardo Urbina | ½–½ | Nathaniel Mathurin | Round 10: Ricardo Urbina - Nathaniel Mathurin | Vienna Game: Max Lange Defense | |
| Jul 6, 2023 | Nathaniel Mathurin | 0–1 | Samid Eduardo Escalona Landi | Round 9: Nathaniel Mathurin - Samid Eduardo Escalona Landi | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Jul 6, 2023 | Esteban Alb Valderrama Quiceno | 1–0 | Nathaniel Mathurin | Round 8: Esteban Alb Valderrama Quiceno - Nathaniel Mathurin | Zukertort Opening | |
| Jul 6, 2023 | Nathaniel Mathurin | 1–0 | Joshua Johnson | Round 7: Nathaniel Mathurin - Joshua Johnson | Queen's Pawn Game: Symmetrical Variation | |
| Jul 6, 2023 | Marcos Ortiz | ½–½ | Nathaniel Mathurin | Round 6: Marcos Ortiz - Nathaniel Mathurin | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Jul 6, 2023 | Nathaniel Mathurin | 1–0 | Lemnys A. Arias | Round 5: Nathaniel Mathurin - Lemnys A. Arias | Queen's Pawn Game: Symmetrical Variation | |
| Jul 6, 2023 | Josue Araujo Sanchez | 1–0 | Nathaniel Mathurin | Round 4: Josue Araujo Sanchez - Nathaniel Mathurin | Zukertort Opening: Quiet System | |
| Jul 6, 2023 | Nathaniel Mathurin | 0–1 | Carlos Daniel Albornoz Cabrera | Round 3: Nathaniel Mathurin - Carlos Daniel Albornoz Cabrera | Catalan Opening: Open Defense | |
| Jul 6, 2023 | Leonardo Valdes Romero | 1–0 | Nathaniel Mathurin | Round 2: Leonardo Valdes Romero - Nathaniel Mathurin | King's Indian Attack | |
| Jul 6, 2023 | Nathaniel Mathurin | 0–1 | Gilberto Hernandez Guerrero | Round 1: Nathaniel Mathurin - Gilberto Hernandez Guerrero | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Jul 6, 2023 | Nathaniel Mathurin | 1–0 | Ricardo Urbina | Round 15: Nathaniel Mathurin - Ricardo Urbina | English Opening: Caro-Kann Defensive System | |
| Jul 5, 2023 | Lemnys A. Arias | 1–0 | Nathaniel Mathurin | Round 14: Lemnys A. Arias - Nathaniel Mathurin | Sicilian Defense: Kan Variation, Knight Variation | |
| Jul 5, 2023 | Nathaniel Mathurin | 0–1 | Jorge Luis Baules Rodriguez | Round 13: Nathaniel Mathurin - Jorge Luis Baules Rodriguez | King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line | |
| Jul 5, 2023 | Orlando Husbands | 1–0 | Nathaniel Mathurin | Round 12: Orlando Husbands - Nathaniel Mathurin | Indian Defense: Przepiorka Variation | |
| Jul 5, 2023 | Nathaniel Mathurin | ½–½ | Gilberto Hernandez Guerrero | Round 11: Nathaniel Mathurin - Gilberto Hernandez Guerrero | Benoni Defense: Classical Variation, Main Line | |
| Jul 5, 2023 | Josue Araujo Sanchez | 1–0 | Nathaniel Mathurin | Round 10: Josue Araujo Sanchez - Nathaniel Mathurin | Zukertort Opening | |
| Jul 4, 2023 | Nathaniel Mathurin | 1–0 | Samid Eduardo Escalona Landi | Round 9: Nathaniel Mathurin - Samid Eduardo Escalona Landi | Indian Defense: West Indian Defense | |
| Jul 4, 2023 | Leonardo Valdes Romero | 1–0 | Nathaniel Mathurin | Round 8: Leonardo Valdes Romero - Nathaniel Mathurin | Catalan Opening: Open Defense, Classical Line | |
| Jul 4, 2023 | Joshua Christie | * | Nathaniel Mathurin | Round 7: Joshua Christie - Nathaniel Mathurin | Ruy Lopez: Classical Variation | |
| Jul 4, 2023 | Nathaniel Mathurin | ½–½ | Davidson Gabriel | Round 6: Nathaniel Mathurin - Davidson Gabriel | Indian Defense: Anti-Nimzo-Indian | |
| Jul 4, 2023 | Carlos Daniel Albornoz Cabrera | 1–0 | Nathaniel Mathurin | Round 5: Carlos Daniel Albornoz Cabrera - Nathaniel Mathurin | Sicilian Defense: Najdorf Variation | |
| Jul 3, 2023 | Nathaniel Mathurin | 0–1 | Joshua Johnson | Round 4: Nathaniel Mathurin - Joshua Johnson | Queen's Gambit Declined: Cambridge Springs Defense | |
| Jul 3, 2023 | Edgardo J. Almedina Ortiz | 1–0 | Nathaniel Mathurin | Round 3: Edgardo J. Almedina Ortiz - Nathaniel Mathurin | Nimzo-Indian Defense: Classical Variation, Keres Defense | |
| Jul 3, 2023 | Nathaniel Mathurin | 0–1 | Jose Gabriel Cardoso Cardoso | Round 2: Nathaniel Mathurin - Jose Gabriel Cardoso Cardoso | English Opening: King's English Variation, Nimzowitsch-Flohr Variation | |
| Jul 3, 2023 | Marcos Ortiz | 1–0 | Nathaniel Mathurin | Round 1: Marcos Ortiz - Nathaniel Mathurin | Scotch Game: Scotch Gambit, Advance Variation | |
