| Apr 19, 2026 | Piotrowicz | ½–½ | Kozaczuk | new tournament description | Pirc Defense | |
| Apr 18, 2026 | Kozaczuk | ½–½ | Gorzelinski | new tournament description | Slav Defense: Czech Variation, Wiesbaden Variation | |
| Apr 17, 2026 | Kilianczyk | 1–0 | Kozaczuk | new tournament description | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Apr 16, 2026 | Kozaczuk | 1–0 | Baj | new tournament description | King's Indian Defense: Averbakh Variation, Flexible Defense | |
| Apr 14, 2026 | Krzeszowiec | 0–1 | Kozaczuk | new tournament description | Réti Opening: Anglo-Slav Variation, Gurevich System | |
| Apr 14, 2026 | Kozaczuk | 0–1 | Witkowski | new tournament description | Semi-Slav Defense: Accelerated Move Order | |
| Apr 13, 2026 | Kozaczuk | 0–1 | Gregorczyk | new tournament description | Benoni Defense: Classical Variation, Averbakh-Grivas Attack | |
| Apr 12, 2026 | Wieczorek | 0–1 | Kozaczuk | new tournament description | Hungarian Opening | |
| Apr 11, 2026 | Wojciechowski | 0–1 | Kozaczuk | new tournament description | Queen's Pawn Game: London System | |
| Jun 2, 2025 | Kozaczuk | 0–1 | Soliwoda | Open | Indian Defense: Normal Variation | |
| Jun 1, 2025 | Zych | 0–1 | Kozaczuk | Open-3 | Caro-Kann Defense | |
| May 31, 2025 | Kozaczuk | 1–0 | Pinkowski | Open-3 | Queen's Gambit Declined: Queen's Knight Variation | |
| May 31, 2025 | Baran | 1–0 | Kozaczuk | Open | Caro-Kann Defense: Classical Variation | |
| May 31, 2025 | Kozaczuk | 1–0 | Dubiel | Open-3 | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| May 31, 2025 | Spyra | 1–0 | Kozaczuk | Open | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| May 31, 2025 | Kozaczuk | 1–0 | Szumiec | Open-3 | Slav Defense: Modern Line | |
| May 31, 2025 | Wolkowski | * | Kozaczuk | Open | ? | |
| May 31, 2025 | Matskevich | 0–1 | Kozaczuk | Open | Bird Opening: Dutch Variation | |
| May 31, 2025 | Kozaczuk | 0–1 | Budzisz | Open | Nimzo-Indian Defense: Leningrad Variation | |
| Aug 22, 2024 | Kozaczuk | 0–1 | Maj | 60. Jubileuszowy Miedzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN D | Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line | |
| Aug 20, 2024 | Kozaczuk | 0–1 | Bastrzyk | 60. Jubileuszowy Miedzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN D | King's Indian Defense: Averbakh Variation, Main Line | |
| Aug 19, 2024 | Tarasiuk | ½–½ | Kozaczuk | 60. Jubileuszowy Miedzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN D | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Aug 18, 2024 | Kozaczuk | 0–1 | Darowicki | 60. Jubileuszowy Miedzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN D | Semi-Slav Defense | |
| Dec 10, 2022 | Kozaczuk | * | Sykacz | Chron PESEL pl OPEN C | ? | |
| — | Kozaczuk | 1–0 | Majcher | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Nimzo-Indian Defense: Leningrad Variation | |
| — | Kozaczuk | 1–0 | Konopka | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Nimzo-Indian Defense: Rubinstein System | |
| — | Kozaczuk | 1–0 | Gorgolewski | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Queen's Gambit Declined: Queen's Knight Variation | |
| — | Kozaczuk | 0–1 | Kozaczynski | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Dutch Defense: Hopton Attack | |
| — | Kozaczuk | 0–1 | Borowska-Sorus | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Indian Defense: Normal Variation | |
| — | Sokolowski | 1–0 | Kozaczuk | rubinsteinE | King's Indian Attack | |
| — | Perkowski | ½–½ | Kozaczuk | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Caro-Kann Defense: Classical Variation, Flohr Variation | |
| — | Gasik | 1–0 | Kozaczuk | rubinsteinE | Réti Opening: Anglo-Slav Variation, Bogoljubow Variation | |
| — | Boncela | 0–1 | Kozaczuk | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Caro-Kann Defense: Classical Variation, Spassky Variation | |
| — | Podgorski | ½–½ | Kozaczuk | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Sicilian Defense: Four Knights Variation | |
| — | Kruczynski | 1–0 | Kozaczuk | rubinsteinE | Caro-Kann Defense: Advance Variation, Tal Variation | |
| — | Zawadzki | ½–½ | Kozaczuk | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Slav Defense: Modern Line | |