| Mar 1, 2026 | Arp | ½–½ | Green | Round 5: Arp, Piotr Alexander - Green, Joel | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Mar 1, 2026 | Arnott | 1–0 | Arp | Round 4: Arnott, Jonathan W - Arp, Piotr Alexander | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Feb 28, 2026 | Arp | 0–1 | Fowler | Round 2: Arp, Piotr Alexander - Fowler, Jonathan | Tarrasch Defense: Schara Gambit | |
| Feb 28, 2026 | Modi | 1–0 | Arp | Round 1: Modi, Shyam Jagdish - Arp, Piotr Alexander | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| Feb 22, 2026 | Arjun Gupta | 1–0 | Arp | Round 9: Arjun Gupta - Arp, Piotr Alexander | London System | |
| Feb 22, 2026 | Arp | ½–½ | Conway-Lees | Round 8: Arp, Piotr Alexander - Conway-Lees, Joe | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Feb 22, 2026 | Lee | 1–0 | Arp | Round 7: Lee, Hyunjun - Arp, Piotr Alexander | King's Indian Defense: Semi-Averbakh System | |
| Feb 22, 2026 | Arp | ½–½ | Camp | Round 6: Arp, Piotr Alexander - Camp, Imogen A L | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Feb 21, 2026 | Cordova-Lopez | 1–0 | Arp | Round 5: Cordova-Lopez, Diego Anton - Arp, Piotr Alexander | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Feb 21, 2026 | Arp | 1–0 | Fretwell | Round 4: Arp, Piotr Alexander - Fretwell, Ellis | Benko Gambit Accepted: Modern Variation | |
| Feb 21, 2026 | Ye | 0–1 | Arp | Round 3: Ye, David - Arp, Piotr Alexander | Sicilian Defense: Closed | |
| Feb 21, 2026 | Arp | 1–0 | Harris | Round 2: Arp, Piotr Alexander - Harris, Timothy | Grünfeld Defense: Exchange Variation, Seville Variation | |
| Feb 21, 2026 | Arp | 0–1 | Gray | Round 1: Arp, Piotr Alexander - Gray, Edward | Benko Gambit Accepted: Modern Variation | |
| Jun 14, 2025 | Beduschi | 1–0 | Arp | ODJM A 2025 | King's Indian Attack: Symmetrical Defense | |
| Jun 13, 2025 | Arp | ½–½ | Matthes | ODJM A 2025 | Queen's Gambit Accepted: Showalter Variation | |
| Jun 12, 2025 | Seitz | 0–1 | Arp | ODJM A 2025 | Sicilian Defense: McDonnell Attack | |
| Jun 11, 2025 | Arp | 0–1 | Groessing | ODJM A 2025 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Jun 11, 2025 | Ruddat | 1–0 | Arp | ODJM A 2025 | Sicilian Defense: Najdorf Variation | |
| Jun 10, 2025 | Arp | ½–½ | Vollmar | ODJM A 2025 | Queen's Gambit Declined: Exchange Variation | |
| Jun 9, 2025 | Schulz | 0–1 | Arp | ODJM A 2025 | King's Indian Attack: Symmetrical Defense | |
| Jun 8, 2025 | Retzlaff | ½–½ | Arp | ODJM A 2025 | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 8, 2025 | Arp | 0–1 | Martin Fernandez | ODJM A 2025 | Slav Defense: Czech Variation, Dutch Variation | |
| Aug 10, 2024 | Arp | ½–½ | Tesic | Round 1: Arp, Piotr Alexander - Tesic, Luka | Slav Defense: Chebanenko Variation | |
| Aug 1, 2024 | Arp | 0–1 | Best | Round 2: Arp, Piotr Alexander - Best, Florian | Semi-Slav Defense: Marshall Gambit | |
| Aug 1, 2024 | Kostowski | 0–1 | Arp | Round 1: Kostowski, Ireneus, Dr. - Arp, Piotr Alexander | Pirc Defense: Classical Variation | |
