| Jul 13, 2026 | Bilochenko | 1–0 | Pieszko | Blitz C14 | English Opening: King's English Variation, Reversed Sicilian | |
| Jul 13, 2026 | Pelczarski | 1–0 | Pieszko | Blitz C14 | Queen's Indian Defense: Riumin Variation | |
| May 29, 2026 | Pieszko | 0–1 | Brudnicki | II DMP Juniorow 2026 | Réti Opening: Anglo-Slav Variation, with g3 | |
| May 28, 2026 | Pieszko | 1–0 | Urych | II DMP Juniorow 2026 | English Opening: Great Snake Variation | |
| May 27, 2026 | Wisniarek | ½–½ | Pieszko | II DMP Juniorow 2026 | Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line | |
| May 26, 2026 | Pieszko | 1–0 | Kowalczyk | II DMP Juniorow 2026 | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| May 25, 2026 | Zyznowski | 0–1 | Pieszko | II DMP Juniorow 2026 | Queen's Indian Defense: Capablanca Variation | |
| May 24, 2026 | Pieszko | 1–0 | Wasiluk | II DMP Juniorow 2026 | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 23, 2026 | Kosicki | 0–1 | Pieszko | II DMP Juniorow 2026 | Sicilian Defense: Accelerated Dragon | |
| May 22, 2026 | Pieszko | 0–1 | Rzadkowska | II DMP Juniorow 2026 | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| May 21, 2026 | Kozak | ½–½ | Pieszko | II DMP Juniorow 2026 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jan 11, 2026 | Pieszko | 1–0 | Obuchowicz | Round 9: Pieszko, Antoni - Obuchowicz, Jerzy | English Opening: King's English Variation | |
| Jan 11, 2026 | Filipkowska | 0–1 | Pieszko | Round 8: Filipkowska, Martyna - Pieszko, Antoni | Sicilian Defense: Old Sicilian | |
| Jan 11, 2026 | Pieszko | 1–0 | Jan Kozlowski | Round 7: Pieszko, Antoni - Jan Kozlowski | English Opening: Symmetrical Variation | |
| Jan 11, 2026 | Milewski | 1–0 | Pieszko | Round 6: Milewski, Filip - Pieszko, Antoni | Indian Defense: London System | |
| Jan 11, 2026 | Pieszko | 0–1 | Businski | Round 5: Pieszko, Antoni - Businski, Jan | English Opening: King's English Variation, Closed System, Full Symmetry | |
| Jan 11, 2026 | Adam Orlowski | 0–1 | Pieszko | Round 4: Adam Orlowski - Pieszko, Antoni | Indian Defense: Normal Variation | |
| Jan 11, 2026 | Pieszko | 1–0 | Panasiewicz | Round 3: Pieszko, Antoni - Panasiewicz, Natalia | English Opening: King's English Variation | |
| Jan 11, 2026 | Kotarski | 1–0 | Pieszko | Round 2: Kotarski, Bartosz - Pieszko, Antoni | Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation | |
| — | Pieszko | 0–1 | Obrycki | Mistrzostwa Polski Juniorów w szachach szybkich C14 | English Opening: King's English Variation, Taimanov Variation | |
| — | Pieszko | 0–1 | Diachek | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C14 | English Opening: King's English Variation, Closed System, Full Symmetry | |
| — | Pieszko | 0–1 | Obrycki | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C14 | English Opening: King's English Variation | |
| — | Pieszko | 0–1 | Kaszuba | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C14 | English Opening: Anglo-Indian Defense | |
| — | Zawisza | 0–1 | Pieszko | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C14 | Sicilian Defense: Najdorf Variation | |