| Jun 27, 2026 | Janeczko | 1–0 | Leskiewicz | Macieja Memorial | Philidor Defense: Lion Variation | |
| Jun 27, 2026 | Bartel | 0–1 | Leskiewicz | Macieja Memorial | Torre Attack: Classical Defense | |
| Jun 27, 2026 | Leskiewicz | 0–1 | Korszanski | Macieja Memorial | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Jun 27, 2026 | Leskiewicz | 1–0 | Wieckowski | Macieja Memorial | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Jun 27, 2026 | Borischik | 1–0 | Leskiewicz | Macieja Memorial | Pirc Defense | |
| Jun 27, 2026 | Leskiewicz | 1–0 | Krasenkowa | Macieja Memorial | English Opening: Symmetrical Variation, Duchamp Variation | |
| Dec 30, 2025 | Sawicki | 1–0 | Leskiewicz | Runda 9: Sawicki, Dorian - Leskiewicz, Ignacy | Rat Defense: English Rat | |
| Dec 30, 2025 | Leskiewicz | 1–0 | Rajlich | Runda 8: Leskiewicz, Ignacy - Rajlich, Vaclav | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Dec 30, 2025 | Leskiewicz | 1–0 | Wasiluk | Runda 7: Leskiewicz, Ignacy - Wasiluk, Mateusz | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Dec 29, 2025 | Madejski | 1–0 | Leskiewicz | Runda 6: Madejski, Milosz - Leskiewicz, Ignacy | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Dec 29, 2025 | Leskiewicz | 0–1 | Kasperek | Runda 5: Leskiewicz, Ignacy - Kasperek, Ryszard | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Dec 28, 2025 | Fukowski | ½–½ | Leskiewicz | Runda 4: Fukowski, Pawel - Leskiewicz, Ignacy | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Dec 27, 2025 | Leskiewicz | 1–0 | Zimny | Runda 3: Leskiewicz, Ignacy - Zimny, Jakub | Slav Defense: Schlechter Variation | |
| Dec 27, 2025 | Kicinska | 0–1 | Leskiewicz | Runda 2: Kicinska, Anna - Leskiewicz, Ignacy | Torre Attack: Classical Defense, Nimzowitsch Variation | |
| Dec 27, 2025 | Leskiewicz | 1–0 | Zalewski | Runda 1: Leskiewicz, Ignacy - Zalewski, Witold | Sicilian Defense: Moscow Variation | |
| Sep 20, 2025 | Mroczkowski | * | Leskiewicz | Szansa25 | ? | |
| Sep 20, 2025 | Leskiewicz | 0–1 | Pacan-Milej | Szansa25 | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Sep 20, 2025 | Stanczak | * | Leskiewicz | Szansa25 | ? | |
| Sep 20, 2025 | Leskiewicz | 0–1 | Radzimski | Szansa25 | English Opening: Neo-Catalan | |
| Sep 20, 2025 | Owczarski | * | Leskiewicz | Szansa25 | ? | |
| Sep 20, 2025 | Leskiewicz | * | Malicka | Szansa25 | ? | |
| Sep 20, 2025 | Jaszczuk | * | Leskiewicz | Szansa25 | ? | |
| Sep 20, 2025 | Leskiewicz | 0–1 | Cukrowski | Szansa25 | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Sep 20, 2025 | Kwiecinski | * | Leskiewicz | Szansa25 | ? | |
| Sep 20, 2025 | Leskiewicz | * | Kokoszczynski | Szansa25 | Zukertort Opening: Sicilian Invitation | |
| Sep 7, 2025 | Leskiewicz | ½–½ | Lizak | 2 liga 2025 1 | King's Indian Attack: Keres Variation | |
| Sep 6, 2025 | Ciupka | 0–1 | Leskiewicz | 2 liga 2025 1 | Pirc Defense | |
| Sep 5, 2025 | Leskiewicz | 0–1 | Malik | 2 liga 2025 1 | Modern Defense: Lizard Defense, Mittenberger Gambit | |
| Sep 4, 2025 | Muc | 1–0 | Leskiewicz | 2 liga 2025 1 | Indian Defense: Knights Variation | |
| Sep 3, 2025 | Leskiewicz | ½–½ | Turski | 2 liga 2025 1 | King's Indian Attack | |
| Sep 2, 2025 | Korszanski | 0–1 | Leskiewicz | 2 liga 2025 1 | Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit | |
| Sep 1, 2025 | Leskiewicz | 0–1 | Pietrzak | 2 liga 2025 1 | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Feb 29, 2024 | Polak | 1–0 | Leskiewicz | Round 2: Polak, Tomas - Leskiewicz, Ignacy | Nimzo-Indian Defense: Kmoch Variation | |
| Jan 4, 2024 | Leskiewicz | 1–0 | Gaurav | Cracovia 2023 Open A | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jan 3, 2024 | Luczak | 0–1 | Leskiewicz | Cracovia 2023 Open A | Indian Defense | |
| Jan 2, 2024 | Leskiewicz | 0–1 | Anwesh | Cracovia 2023 Open A | Caro-Kann Defense: Endgame Offer | |
| Jan 2, 2024 | Pniaczek | 0–1 | Leskiewicz | Cracovia 2023 Open A | Pirc Defense | |
| Dec 31, 2023 | Leskiewicz | 1–0 | Krainski | Cracovia 2023 Open A | English Opening: Agincourt Defense, Wimpy System | |
| Dec 30, 2023 | Gkavardinas | 1–0 | Leskiewicz | Cracovia 2023 Open A | Caro-Kann Defense | |
| Dec 29, 2023 | Leskiewicz | ½–½ | Katsanis | Cracovia 2023 Open A | Nimzo-Larsen Attack: Classical Variation | |
| Dec 28, 2023 | Baum | 1–0 | Leskiewicz | Cracovia 2023 Open A | Philidor Defense: Lion Variation | |
| Dec 27, 2023 | Leskiewicz | 0–1 | Bogdanov | Cracowia 2023 Open A | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Oct 1, 2023 | Leskiewicz | ½–½ | Sygulski | DMP - I Liga 2023 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Sep 29, 2023 | Madej | ½–½ | Leskiewicz | DMP - I Liga 2023 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Sep 28, 2023 | Leskiewicz | ½–½ | Krawczyk | DMP - I Liga 2023 | Zukertort Opening: Nimzo-Larsen Variation | |
| Sep 27, 2023 | Padalka | 0–1 | Leskiewicz | DMP - I Liga 2023 | Polish Opening | |
| Sep 26, 2023 | Leskiewicz | 1–0 | Panek | DMP - I Liga 2023 | Modern Defense: Standard Line | |
| Sep 25, 2023 | Leskiewicz | 0–1 | Denderski | DMP - I Liga 2023 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 24, 2023 | Flak | ½–½ | Leskiewicz | DMP - I Liga 2023 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Sep 23, 2023 | Leskiewicz | 1–0 | Bartel | DMP - I Liga 2023 | Ruy Lopez: Closed, Flohr System | |
| Aug 10, 2022 | Kulon | ½–½ | Leskiewicz | Open A | Trompowsky Attack: Classical Defense | |
| Aug 9, 2022 | Leskiewicz | ½–½ | Rog | Open A | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Aug 9, 2022 | Zaninotto | 0–1 | Leskiewicz | Open A | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Aug 7, 2022 | Leskiewicz | 0–1 | Pietruszewski | Open A | Caro-Kann Defense: Maróczy Variation | |
| Aug 6, 2022 | Kubicka | 1–0 | Leskiewicz | Open A | French Defense: Normal Variation | |
| Aug 5, 2022 | Leskiewicz | 0–1 | Czernek | Open A | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Aug 5, 2022 | Nowak | 1–0 | Leskiewicz | Open A | English Opening: Symmetrical Variation | |
| Aug 4, 2022 | Leskiewicz | 1–0 | Kaczmarek | Open A | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Aug 3, 2022 | Goluch | ½–½ | Leskiewicz | Open A | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Dec 13, 2021 | Leskiewicz | 1–0 | Budzisz | IMP20b | French Defense: Tarrasch Variation, Open System | |
| Dec 12, 2021 | Maslanka | 0–1 | Leskiewicz | IMP20b | Pirc Defense: Austrian Attack, Weiss Variation | |
| Dec 11, 2021 | Sowinski | 1–0 | Leskiewicz | IMP20 | English Opening | |
| Dec 11, 2021 | Sowinski | * | Leskiewicz | IMP20b | ? | |
| Dec 10, 2021 | Leskiewicz | 0–1 | Raczek | IMP20 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Dec 10, 2021 | Leskiewicz | * | Raczek | IMP20b | ? | |
| Dec 9, 2021 | Leskiewicz | 1–0 | Warchol | IMP20b | Sicilian Defense: Richter-Rauzer Variation | |
| Dec 8, 2021 | Radzimski | 0–1 | Leskiewicz | U20 Polish Youth Championship | Pirc Defense: Austrian Attack | |
| Dec 7, 2021 | Leskiewicz | 0–1 | Mulawa | IMP20 | Sicilian Defense: Nimzo-American Variation | |
| Dec 7, 2021 | Leskiewicz | * | Mulawa | IMP20b | ? | |
| Dec 6, 2021 | Bartodziej | 0–1 | Leskiewicz | IMP20b | Sicilian Defense: Najdorf Variation | |
| Dec 6, 2021 | Mis | 1–0 | Leskiewicz | IMP20 | English Defense | |
| Sep 12, 2021 | Golda | ½–½ | Leskiewicz | Polish League Division 1 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Sep 11, 2021 | Leskiewicz | 0–1 | Maksimenko | Polish League Division 1 | Caro-Kann Defense: Panov Attack | |
| Sep 10, 2021 | Hasterok | 1–0 | Leskiewicz | Polish League Division 1 | Nimzo-Indian Defense: Kmoch Variation | |
| Sep 9, 2021 | Leskiewicz | ½–½ | Sernecki | Polish League Division 1 | French Defense: Tarrasch Variation, Morozevich Variation | |
| Sep 8, 2021 | Musial | 0–1 | Leskiewicz | Polish League Division 1 | English Defense | |
| Sep 7, 2021 | Leskiewicz | 1–0 | Wojdak | Polish League Division 1 | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Sep 6, 2021 | Luberanski | ½–½ | Leskiewicz | Polish League Division 1 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | |
| Sep 5, 2021 | Leskiewicz | ½–½ | Janeczko | Polish League Division 1 | Nimzo-Larsen Attack: Modern Variation | |
| Sep 4, 2021 | Bartel | 0–1 | Leskiewicz | Polish League Division 1 | Sicilian Defense: Kramnik Variation | |
| Jul 18, 2021 | Leskiewicz | 0–1 | Seemann | Warsaw Najdorf Festival | ? | |
| Jul 11, 2021 | Leskiewicz | 0–1 | Romanishin | Warsaw Najdorf Festival | Ruy Lopez: Closed | |
| — | Leskiewicz | 1–0 | Kopinski | Memorial Adolfa Anderssena 2025 | Nimzo-Larsen Attack: Classical Variation | |
| — | Leskiewicz | 1–0 | Kozlowski | anderssen2025 | Zukertort Opening: Nimzo-Larsen Variation | |
| — | Leskiewicz | 0–1 | Kowalski | anderssen2025 | Nimzo-Larsen Attack: Classical Variation | |
| — | Leskiewicz | 1–0 | Jankowski | anderssen2025 | Zukertort Opening: Nimzo-Larsen Variation | |
| — | Leskiewicz | 0–1 | Cukrowski | Round 2: Leskiewicz, Ignacy - Cukrowski, Filip | ? | |
| — | Leskiewicz | 0–1 | Pakleza | Round 4: Leskiewicz, Ignacy - Pakleza, Zbigniew | ? | |
| — | Leskiewicz | 1–0 | Drygas | Round 6: Leskiewicz, Ignacy - Drygas, Wojciech | ? | |
| — | Leskiewicz | 1–0 | Djuric | Round 8: Leskiewicz, Ignacy - Djuric, Stefan | ? | |
| — | Leskiewicz | ½–½ | Perets | wroclaw OPEN A | English Opening: Symmetrical Variation, Duchamp Variation | |
| — | Leskiewicz | 1–0 | Jablonski | wroclaw OPEN A | King's Indian Attack: Spassky Variation | |
| — | Leskiewicz | 1–0 | Jablonski | wroclaw OPEN A | Sicilian Defense: O'Kelly Variation, Venice System | |
| — | Trebala | 0–1 | Leskiewicz | Memorial Adolfa Anderssena 2025 | Queen's Indian Defense: Kasparov Variation | |
| — | Nagly | ½–½ | Leskiewicz | anderssen2025 | Philidor Defense: Lion Variation | |
| — | Plichta | 1–0 | Leskiewicz | anderssen2025 | King's Indian Attack | |
| — | Jaroszewicz | 0–1 | Leskiewicz | Memorial Adolfa Anderssena 2025 | Philidor Defense: Lion Variation | |
| — | Golenia | 1–0 | Leskiewicz | anderssen2025 | Philidor Defense: Lion Variation | |
| — | Tiunova | 0–1 | Leskiewicz | Round 1: Tiunova, Mariia - Leskiewicz, Ignacy | ? | |
| — | Szymon Sikora | 0–1 | Leskiewicz | Round 3: Szymon Sikora - Leskiewicz, Ignacy | ? | |