| May 29, 2026 | Pienio | 0–1 | Sieczkowska | II DMP Juniorow 2026 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | |
| May 28, 2026 | Oberc | 0–1 | Sieczkowska | II DMP Juniorow 2026 | Sicilian Defense: Boleslavsky Variation | |
| May 27, 2026 | Sieczkowska | 1–0 | Smolinska | II DMP Juniorow 2026 | Caro-Kann Defense: Accelerated Panov Attack | |
| May 26, 2026 | Przewlocka | ½–½ | Sieczkowska | II DMP Juniorow 2026 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| May 25, 2026 | Sieczkowska | 0–1 | Debowska | II DMP Juniorow 2026 | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| May 24, 2026 | Gruszecka | ½–½ | Sieczkowska | II DMP Juniorow 2026 | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| May 23, 2026 | Sieczkowska | 0–1 | Lisica | II DMP Juniorow 2026 | Sicilian Defense: Hyperaccelerated Dragon | |
| May 22, 2026 | Wieczorek | 0–1 | Sieczkowska | II DMP Juniorow 2026 | Sicilian Defense: Modern Variations | |
| May 21, 2026 | Sieczkowska | ½–½ | Dudek | II DMP Juniorow 2026 | Italian Game: Scotch Gambit, Max Lange Attack | |
| Oct 29, 2025 | Sieczkowska | 1–0 | Cid Marcos | Round 1: Sieczkowska, Hanna - Cid Marcos, Laia | Sicilian Defense: Kan Variation, Knight Variation | |
| Sep 30, 2025 | Sieczkowska | ½–½ | Belanova | Round 11: Sieczkowska, Hanna - Belanova, Svetlana | English Opening: Agincourt Defense | |
| Sep 29, 2025 | Zhetpis Symbat | 1–0 | Sieczkowska | Round 10: Zhetpis Symbat - Sieczkowska, Hanna | Sicilian Defense: Moscow Variation | |
| Sep 28, 2025 | Sieczkowska | 1–0 | Gutserieva | Round 9: Sieczkowska, Hanna - Gutserieva, Bierta | Four Knights Game: Gunsberg Variation | |
| Sep 27, 2025 | Burova | 0–1 | Sieczkowska | Round 8: Burova, Aleksandra - Sieczkowska, Hanna | Blumenfeld Countergambit | |
| Sep 26, 2025 | Sieczkowska | 0–1 | Constantin-Ciuntu | Round 7: Sieczkowska, Hanna - Constantin-Ciuntu, Anne-Sophie | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Sep 24, 2025 | Billod-Laillet | 0–1 | Sieczkowska | Round 6: Billod-Laillet, Camille - Sieczkowska, Hanna | Nimzowitsch Defense: Scandinavian Variation, Exchange Variation | |
| Sep 23, 2025 | Guo | 0–1 | Sieczkowska | Round 5: Guo, Anne Xuduo - Sieczkowska, Hanna | Italian Game: Scotch Gambit, Anderssen Attack | |
| Sep 22, 2025 | Sieczkowska | 0–1 | Saltkhutsishvili | Round 4: Sieczkowska, Hanna - Saltkhutsishvili, Sara | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Sep 21, 2025 | Sieczkowska | 1–0 | Sivashankar | Round 3: Sieczkowska, Hanna - Sivashankar, Shrishti | Sicilian Defense: Kan Variation, Modern Variation | |
| Sep 20, 2025 | Sreekumar | ½–½ | Sieczkowska | Round 2: Sreekumar, Gayathri - Sieczkowska, Hanna | Rat Defense: English Rat | |
| Sep 19, 2025 | Sieczkowska | 0–1 | Zhou | Round 1: Sieczkowska, Hanna - Zhou, Abigail | French Defense: Alekhine-Chatard Attack, Maróczy Variation | |
| Jun 26, 2025 | Sieczkowska | 0–1 | Palahuta | II DMP Juniorow | Sicilian Defense: Hyperaccelerated Dragon | |
| Jun 25, 2025 | Sieczkowska | 1–0 | Panasiewicz | II DMP Juniorow | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 24, 2025 | Racis | 0–1 | Sieczkowska | II DMP Juniorow | Torre Attack: Classical Defense, Nimzowitsch Variation | |
| Jun 23, 2025 | Sieczkowska | 0–1 | Kaczmarczyk | II DMP Juniorow | Queen's Gambit Declined: Barmen Variation | |
| Jun 22, 2025 | Nguyen Doan | 1–0 | Sieczkowska | II DMP Juniorow | Sicilian Defense: Four Knights Variation | |
| Jun 21, 2025 | Wawrzyniak | 0–1 | Sieczkowska | II DMP Juniorow | Modern Defense | |
| Jun 20, 2025 | Sieczkowska | 1–0 | Zelazny | II DMP Juniorow | Three Knights Opening | |
| Jun 19, 2025 | Holubowska | 0–1 | Sieczkowska | II DMP Juniorow | Sicilian Defense: Delayed Alapin Variation | |
| Jun 18, 2025 | Sieczkowska | 1–0 | Switalska | II DMP Juniorow | Scotch Game | |
| Aug 24, 2024 | Wang | 1–0 | Sieczkowska | EYCC 2024 - G10 | Nimzo-Indian Defense | |
| Aug 22, 2024 | Serradell Munoz | ½–½ | Sieczkowska | EYCC 2024 - G10 | Sicilian Defense: Kan Variation, Wing Attack | |
| May 7, 2023 | Babij | 0–1 | Sieczkowska | MP Dzieci do lat 8 | King's Pawn Game: Maróczy Defense | |
| May 6, 2023 | Sieczkowska | 0–1 | Taradajko | MP Dzieci do lat 8 | English Opening: Agincourt Defense | |
| May 6, 2023 | Cyboran | 0–1 | Sieczkowska | MP Dzieci do lat 8 | Sicilian Defense: O'Kelly Variation, Quiet System | |
| May 5, 2023 | Sieczkowska | ½–½ | Przewlocka | MP Dzieci do lat 8 | English Opening: King's English Variation | |
| May 5, 2023 | Topylo | 1–0 | Sieczkowska | MP Dzieci do lat 8 | Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange | |
| May 4, 2023 | Sieczkowska | 1–0 | Karcz | MP Dzieci do lat 8 | King's Knight Opening: Normal Variation | |
| May 4, 2023 | Cholewa | 0–1 | Sieczkowska | MP Dzieci do lat 8 | Queen's Gambit Declined: Austrian Defense | |
| May 4, 2023 | Grzeszczyk | 1–0 | Sieczkowska | MP Dzieci do lat 8 | Sicilian Defense: French Variation | |
| May 3, 2023 | Sieczkowska | 1–0 | Lechowska | MP Dzieci do lat 8 | Sicilian Defense: French Variation | |
| — | Sieczkowska | 1–0 | Sirocka | D10 | Scotch Game: Potter Variation | |
| — | Sieczkowska | 1–0 | Malaczynska | D10 | Scotch Game: Lolli Variation | |
| — | Sieczkowska | 0–1 | Bos | D10 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| — | Sieczkowska | 1–0 | Tiunova | D10 | Scotch Game: Lolli Variation | |
| — | Sieczkowska | 1–0 | Grech | D10 | Sicilian Defense: Hyperaccelerated Fianchetto | |
| — | Sieczkowska | 1–0 | Ciszewska | D10b | Sicilian Defense: Dragon Variation | |
| — | Sieczkowska | 1–0 | Psarska | D10b | Scotch Game: Schmidt Variation | |
| — | Sieczkowska | 1–0 | Tiunova | D10b | Caro-Kann Defense: Exchange Variation | |
| — | Sieczkowska | 0–1 | Bos | D10b | Sicilian Defense: Accelerated Dragon, Exchange Variation | |
| — | Sieczkowska | 1–0 | Szczurek | D10b | Scotch Game: Schmidt Variation | |
| — | Sieczkowska | 0–1 | Topylo | D10b | Sicilian Defense: Najdorf Variation | |
| — | Grycel | 0–1 | Sieczkowska | D10 | Queen's Pawn Game: Zukertort Variation | |
| — | Przewlocka | ½–½ | Sieczkowska | D10 | Sicilian Defense: French Variation | |
| — | Kocisz | ½–½ | Sieczkowska | D10 | Sicilian Defense: French Variation | |
| — | Topylo | 0–1 | Sieczkowska | D10 | Sicilian Defense: Kan Variation, Wing Attack | |
| — | Szczurek | 0–1 | Sieczkowska | D10 | Sicilian Defense: Kan Variation, Modern Variation | |
| — | Taradajko | 0–1 | Sieczkowska | D10 | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| — | Pawlowska | 1–0 | Sieczkowska | D10b | Sicilian Defense: French Variation | |
| — | Kocisz | 0–1 | Sieczkowska | D10b | Sicilian Defense: French Variation | |
| — | Grzeszczyk | 0–1 | Sieczkowska | D10b | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| — | Taradajko | 0–1 | Sieczkowska | D10b | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| — | Guziana | 0–1 | Sieczkowska | D10b | Queen's Gambit Declined: Exchange Variation, Reshevsky Variation | |
| — | Karcz | 0–1 | Sieczkowska | D10b | Sicilian Defense: Closed | |
| — | Wilgosz | 1–0 | Sieczkowska | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Sicilian Defense: Delayed Alapin Variation | |