| Jan 2, 2026 | Kruse | 1–0 | Kozlowski | XXXVI Miedzynarodowy Festiwal Szachowy CRACOVIA 2025 Grupa A | Semi-Slav Defense: Noteboom Variation | |
| Dec 30, 2025 | Kozlowski | 0–1 | Costache | XXXVI Miedzynarodowy Festiwal Szachowy CRACOVIA 2025 Grupa A | Bogo-Indian Defense: Retreat Variation | |
| Dec 29, 2025 | Pycinski | 1–0 | Kozlowski | XXXVI Miedzynarodowy Festiwal Szachowy CRACOVIA 2025 Grupa A | French Defense: Advance Variation, Milner-Barry Gambit, Main Line | |
| Dec 28, 2025 | Kozlowski | 0–1 | Kovalskyi | Open A | King's Indian Attack: Sicilian Variation | |
| Dec 27, 2025 | Stefanou | ½–½ | Kozlowski | Open A | Queen's Pawn Game: Zukertort Variation | |
| Sep 11, 2025 | Uhryn | ½–½ | Kozlowski | I Liga 6-10 | French Defense: Two Knights Variation | |
| Sep 10, 2025 | Kozlowski | ½–½ | Dziewonski | I Liga 1-5 | Queen's Pawn Game: Zukertort Variation | |
| Sep 9, 2025 | Dudzinski | ½–½ | Kozlowski | I Liga 1-5 | French Defense: King's Indian Attack | |
| Sep 8, 2025 | Kozlowski | ½–½ | Piotrowski | I Liga 1-5 | Zukertort Opening: Sicilian Invitation | |
| Sep 7, 2025 | Dzhuguryan | 0–1 | Kozlowski | I Liga 1-5 | Queen's Pawn Game: Zukertort Variation | |
| Sep 6, 2025 | Kozlowski | ½–½ | Suliborski | I Liga 1-5 | Queen's Pawn Game: Zukertort Variation | |
| Jun 2, 2024 | Kozlowski | 0–1 | Radzimski | GRA | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 1, 2024 | Muller | ½–½ | Kozlowski | GRA | Queen's Gambit Declined | |
| May 31, 2024 | Kozlowski | 0–1 | Kasperek | GRA | English Opening: Symmetrical Variation | |
| May 31, 2024 | Kozlowski | ½–½ | Kartsev | GRA | Semi-Slav Defense | |
| May 30, 2024 | Zalega | ½–½ | Kozlowski | GRA | Caro-Kann Defense: Tartakower Variation | |
| Apr 28, 2024 | Oleg Romanishin | ½–½ | Tymrakiewicz | Ostravsky konik 2024 Open A | Indian Defense: Wade-Tartakower Defense | |
| Apr 27, 2024 | Kozlowski | 0–1 | Decuigniere | Ostravsky konik 2024 Open A | Grünfeld Defense: Three Knights Variation, Burille Variation | |
| Jun 20, 2023 | Kozlowski | 1–0 | Maciaszek | DMPJ - I Liga 2023 | Benko Gambit Accepted: Modern Variation | |
| Jun 19, 2023 | Stypka | 1–0 | Kozlowski | DMPJ - I Liga 2023 | Sicilian Defense: Kalashnikov Variation | |
| Jun 18, 2023 | Pisarek | 1–0 | Kozlowski | DMPJ - I Liga 2023 | Caro-Kann Defense: Endgame Variation | |
| Jun 17, 2023 | Kozlowski | 0–1 | Serewa | DMPJ - I Liga 2023 | King's Indian Defense: Fianchetto Variation, Yugoslav System | |
| Jun 16, 2023 | Kozlowski | 0–1 | Serewa | DMPJ - I Liga 2023 | King's Indian Defense: Fianchetto Variation, Yugoslav System | |
| Jun 15, 2023 | Malik | ½–½ | Kozlowski | DMPJ - I Liga 2023 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jun 14, 2023 | Lochinski | 1–0 | Kozlowski | DMPJ - I Liga 2023 | Sicilian Defense: Najdorf Variation | |
| Jun 13, 2023 | Klim | ½–½ | Kozlowski | DMPJ - I Liga 2023 | Caro-Kann Defense: Classical Variation, Lobron System | |
| Jun 11, 2023 | Sliwicki | ½–½ | Kozlowski | MMM 2023 | Queen's Pawn Game: Accelerated London System | |
| Jun 10, 2023 | Kozlowski | 1–0 | Solano | MMM 2023 | Catalan Opening: Closed | |
| Jun 10, 2023 | Muller | 1–0 | Kozlowski | MMM 2023 | Caro-Kann Defense: Tartakower Variation | |
| Jun 9, 2023 | Makhynia | 1–0 | Kozlowski | MMM 2023 | Catalan Opening: Open Defense, Classical Line | |
| Dec 16, 2022 | Kozlowski | 0–1 | Costachi | Katowice | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Dec 16, 2022 | Costachi | 1–0 | Kozlowski | Katowice | Queen's Gambit Declined: Lasker Defense, Teichmann Variation | |
| Aug 9, 2022 | Darda-braver | 1–0 | Kozlowski | III Letni Puchar Malopolski - Tauron 2022 | King's Indian Attack | |
| Aug 8, 2022 | Kozlowski | ½–½ | Kusiak | III Letni Puchar Malopolski - Tauron 2022 | Trompowsky Attack: Classical Defense | |
| Aug 7, 2022 | Sygulski | ½–½ | Kozlowski | III Letni Puchar Malopolski - Tauron 2022 | Indian Defense: Knights Variation | |
| Aug 6, 2022 | Kozlowski | ½–½ | Slezinski | III Letni Puchar Malopolski - Tauron 2022 | Benoni Defense | |
| Aug 6, 2022 | Cichon | ½–½ | Kozlowski | III Letni Puchar Malopolski - Tauron 2022 | Sicilian Defense: Lasker-Dunne Attack | |
| Aug 5, 2022 | Kozlowski | 1–0 | Krawczyk | III Letni Puchar Malopolski - Tauron 2022 | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Aug 5, 2022 | Golda | 1–0 | Kozlowski | III Letni Puchar Malopolski - Tauron 2022 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Aug 4, 2022 | Kozlowski | 1–0 | Mackowiak | III Letni Puchar Malopolski - Tauron 2022 | Bogo-Indian Defense: Retreat Variation | |
| Aug 4, 2022 | Fizer | ½–½ | Kozlowski | III Letni Puchar Malopolski - Tauron 2022 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Jan 11, 2022 | Gajdzica | ½–½ | Kozlowski | Malopolskie Chess Tour - Grupa Mistrzowska | Queen's Gambit Declined: Exchange Variation | |
| Jan 10, 2022 | Kozlowski | ½–½ | Golis | Malopolskie Chess Tour - Grupa Mistrzowska | Yusupov-Rubinstein System | |
| Jan 10, 2022 | Kozlowski | ½–½ | Radzimski | Malopolskie Chess Tour - Grupa Mistrzowska | Semi-Slav Defense: Stoltz Variation | |
| Jan 9, 2022 | Mroz | 1–0 | Kozlowski | Malopolskie Chess Tour - Grupa Mistrzowska | Petrov's Defense: Modern Attack, Center Variation | |
| Jan 8, 2022 | Kozlowski | ½–½ | Gepfert | Malopolskie Chess Tour - Grupa Mistrzowska | Torre Attack: Fianchetto Defense | |
| Jan 8, 2022 | Mirski | 1–0 | Kozlowski | Malopolskie Chess Tour - Grupa Mistrzowska | Sicilian Defense: Dragon Variation | |
| Jan 7, 2022 | Kozlowski | ½–½ | Wysocki | Malopolskie Chess Tour - Grupa Mistrzowska | Torre Attack: Fianchetto Defense | |
| Jan 6, 2022 | Smietanska | 1–0 | Kozlowski | Malopolskie Chess Tour - Grupa Mistrzowska | English Opening: Agincourt Defense | |
| Dec 30, 1899 | Kozlowski | 0–1 | Majek | XXXIII MIEDZYNARODOWE SZACHOWE MISTRZOSTWA MALOPOLSKI - Grupa A | ? | |
| Dec 30, 1899 | Kozlowski | ½–½ | Hnatyshyn | XXXIII MIEDZYNARODOWE SZACHOWE MISTRZOSTWA MALOPOLSKI - Grupa A | Catalan Opening: Open Defense, Classical Line | |
| Dec 30, 1899 | Wnek | ½–½ | Kozlowski | XXXIII MIEDZYNARODOWE SZACHOWE MISTRZOSTWA MALOPOLSKI - Grupa A | Caro-Kann Defense: Exchange Variation | |
| — | Kozlowski | ½–½ | Chylewski | wroclaw OPEN A | Queen's Pawn Game: Symmetrical Variation | |
| — | Kozlowski | ½–½ | Terkiewicz | wroclaw OPEN A | King's Indian Attack | |
| — | Kozlowski | 1–0 | Zombirt | wroclaw OPEN A | Indian Defense: Tartakower Attack | |
| — | Nagly | ½–½ | Kozlowski | wroclaw OPEN A | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| — | Mondrzycki | 1–0 | Kozlowski | wroclaw OPEN A | King's Indian Attack: Double Fianchetto | |
| — | Rosa | 1–0 | Kozlowski | wroclaw OPEN A | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| — | Hoffmann | 1–0 | Kozlowski | wroclaw OPEN A | King's Pawn Game | |