| Sep 14, 2025 | Butkiewicz | 1–0 | Leszczewicz | I Liga 1-5 | English Opening: Symmetrical Variation, Mecking Variation | |
| Sep 13, 2025 | Leszczewicz | ½–½ | Lonski | I Liga 6-10 | Queen's Pawn Game: London System, with e6 | |
| Sep 12, 2025 | Wandor | 1–0 | Leszczewicz | I Liga 1-5 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Sep 11, 2025 | Skowronski | ½–½ | Leszczewicz | I Liga 6-10 | English Opening | |
| Sep 10, 2025 | Leszczewicz | ½–½ | Adamowicz | I Liga 1-5 | Indian Defense: Anti-Nimzo-Indian | |
| Sep 9, 2025 | Kucharski | ½–½ | Leszczewicz | I Liga 6-10 | Sicilian Defense: O'Kelly Variation, Venice System | |
| Sep 8, 2025 | Leszczewicz | 0–1 | Suliborski | I Liga 1-5 | Indian Defense: Wade-Tartakower Defense | |
| Sep 7, 2025 | Pniaczek | 1–0 | Leszczewicz | I Liga 1-5 | Alekhine Defense: Four Pawns Attack, Fianchetto Variation | |
| Sep 6, 2025 | Leszczewicz | 0–1 | Skrzypczak | I Liga 6-10 | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 26, 2025 | Leszczewicz | ½–½ | Czak | II DMP Juniorow | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 25, 2025 | Penar | ½–½ | Leszczewicz | II DMP Juniorow | Rapport-Jobava System | |
| Jun 24, 2025 | Bala | ½–½ | Leszczewicz | II DMP Juniorow | Sicilian Defense: O'Kelly Variation, Normal System | |
| Jun 23, 2025 | Leszczewicz | 1–0 | Lysakowski | II DMP Juniorow | Trompowsky Attack | |
| Jun 22, 2025 | Leszczewicz | 1–0 | Moroz | II DMP Juniorow | Dutch Defense: Hopton Attack | |
| Jun 21, 2025 | Rabenda | ½–½ | Leszczewicz | II DMP Juniorow | Benko Gambit Accepted: Modern Variation | |
| Jun 20, 2025 | Leszczewicz | ½–½ | Polak | II DMP Juniorow | Benoni Defense: Fianchetto Variation | |
| Jun 19, 2025 | Owczarek | 0–1 | Leszczewicz | II DMP Juniorow | English Opening: Four Knights System, Nimzowitsch Variation | |
| Jun 18, 2025 | Leszczewicz | 1–0 | Matuszewski | II DMP Juniorow | Queen's Indian Defense: Fianchetto Variation, Sämisch Variation | |
| Aug 14, 2024 | Leszczewicz | ½–½ | Junc | Festiwal Adolfa Anderssena 2024 B | Queen's Pawn Game: Torre Attack | |
| Aug 13, 2024 | Ziobrowska | 0–1 | Leszczewicz | Festiwal Adolfa Anderssena 2024 B | Alekhine Defense: Four Pawns Attack, Fianchetto Variation | |
| Aug 12, 2024 | Leszczewicz | 0–1 | Klys | Festiwal Adolfa Anderssena 2024 B | Queen's Pawn Game: Torre Attack, Gossip Variation | |
| Aug 12, 2024 | Zuiderweg | ½–½ | Leszczewicz | Festiwal Adolfa Anderssena 2024 B | Alekhine Defense: Exchange Variation | |
| Aug 11, 2024 | Stachowiak | 1–0 | Leszczewicz | Festiwal Adolfa Anderssena 2024 B | Caro-Kann Defense: Advance Variation | |
| Aug 10, 2024 | Leszczewicz | 0–1 | Frac | Festiwal Adolfa Anderssena 2024 B | Benoni Defense: Knight's Tour Variation | |
| Aug 9, 2024 | Leszczewicz | 1–0 | Kryvenko | Festiwal Adolfa Anderssena 2024 B | Modern Defense | |
| Aug 9, 2024 | Khokhlov | ½–½ | Leszczewicz | Festiwal Adolfa Anderssena 2024 B | Alekhine Defense: Modern Variation, Larsen Variation | |
| Aug 8, 2024 | Kawulski-Chodkiewicz | 1–0 | Leszczewicz | Festiwal Adolfa Anderssena 2024 B | Alekhine Defense: Modern Variation, Larsen Variation | |
| Jul 8, 2024 | Leszczewicz | 1–0 | Majek | Macieja Memorial | Queen's Pawn Game: Krause Variation | |
| Jul 8, 2024 | Leszczewicz | 1–0 | Lewandrowski | Macieja Memorial | Torre Attack: Classical Defense, Nimzowitsch Variation | |
| Jul 8, 2024 | Leszczewicz | 0–1 | Czernek | Macieja Memorial | Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line | |
| Jul 8, 2024 | Mizzi | 1–0 | Leszczewicz | Macieja Memorial | Benko Gambit Accepted: Modern Variation | |
| Jul 8, 2024 | Szczotka | 1–0 | Leszczewicz | Macieja Memorial | Benko Gambit Accepted: Fully Accepted Variation | |
| Jul 8, 2024 | Fiszer | 1–0 | Leszczewicz | Macieja Memorial | King's Indian Attack: Symmetrical Defense | |
| Jul 8, 2024 | Chmiel | 1–0 | Leszczewicz | Macieja Memorial | English Opening: King's English Variation | |
| Aug 10, 2022 | Taranowicz | ½–½ | Leszczewicz | open b | Sicilian Defense: O'Kelly Variation, Quiet System | |
| Aug 9, 2022 | Leszczewicz | 1–0 | Kudlak | open b | King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line | |
| Aug 8, 2022 | Ziobrowska | 0–1 | Leszczewicz | open b | Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line | |
| Aug 5, 2022 | Leszczewicz | 0–1 | Bartoszewicz | open b | King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line | |
| Aug 5, 2022 | Mirski | 1–0 | Leszczewicz | Irena Warakomska Memorial | B | Sicilian Defense: O'Kelly Variation | |
| Aug 4, 2022 | Borowik | ½–½ | Leszczewicz | open b | Benko Gambit Accepted: Fully Accepted Variation | |
| Aug 3, 2022 | Leszczewicz | ½–½ | Obolonin | open b | Slav Defense: Alapin Variation | |
| Aug 3, 2022 | Leszczewicz | 1–0 | Huchwajda | VI Miedzynarodowy Memorial Ireny Warakom | Queen's Gambit Accepted: Bogoljubow Defense | |
| Aug 3, 2022 | Butkiewicz | 1–0 | Leszczewicz | VI Miedzynarodowy Memorial Ireny Warakom | Benko Gambit Accepted: Modern Variation | |
| Nov 21, 2021 | Nowakowski | ½–½ | Leszczewicz | pmpjc13 | Indian Defense: Knights Variation | |
| Nov 20, 2021 | Leszczewicz | 0–1 | Wilgosz | pmpjc13 | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Nov 19, 2021 | Osinski | ½–½ | Leszczewicz | pmpjc13 | Sicilian Defense: O'Kelly Variation, Venice System | |
| Nov 18, 2021 | Leszczewicz | 0–1 | Nagly | pmpjc13 | Sicilian Defense: Old Sicilian | |
| Nov 18, 2021 | Nowak | 0–1 | Leszczewicz | pmpjc13 | Benko Gambit | |
| Nov 17, 2021 | Leszczewicz | 1–0 | Trusewicz | pmpjc13 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Nov 16, 2021 | Leszczewicz | 1–0 | Kolendo | pmpjc13 | Tarrasch Defense | |
| Nov 16, 2021 | Wasiluk | ½–½ | Leszczewicz | pmpjc13 | Sicilian Defense: O'Kelly Variation, Venice System | |
| Nov 15, 2021 | Renn | ½–½ | Leszczewicz | pmpjc13 | Sicilian Defense: O'Kelly Variation, Venice System | |
| — | Leszczewicz | ½–½ | Kowalczyk | Rubinstein Chess Festival 2025 - OPEN A | Indian Defense: London System | |
| — | Leszczewicz | 1–0 | Ziobrowska | Rubinstein Chess Festival 2025 - OPEN A | Scotch Game: Potter Variation | |
| — | Leszczewicz | ½–½ | Kiszkiel | Rubinstein Chess Festival 2025 - OPEN A | Sicilian Defense: Alapin Variation | |
| — | Leszczewicz | 0–1 | Jedras | Rubinstein Chess Festival 2025 - OPEN A | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| — | Grot | 1–0 | Leszczewicz | C18 | Alekhine Defense: Scandinavian Variation | |
| — | Witczak | 0–1 | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | Benoni Defense: Knight's Tour Variation | |
| — | Rekuc | 1–0 | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | Zukertort Opening: Nimzo-Larsen Variation | |
| — | Meers | 1–0 | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | Sicilian Defense: O'Kelly Variation, Venice System | |
| — | Szymkiewicz | ½–½ | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | Nimzo-Larsen Attack: Classical Variation | |
| — | Derejczyk | ½–½ | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | French Defense: Exchange Variation, Monte Carlo Variation | |
