| Apr 19, 2026 | Pietras | 0–1 | Pierzak | new tournament description | King's Indian Defense: Makogonov Variation | |
| Apr 18, 2026 | Kilianczyk | 0–1 | Pierzak | new tournament description | Petrov's Defense: Paulsen Attack | |
| Apr 17, 2026 | Pierzak | 1–0 | Kuriata | new tournament description | Nimzo-Larsen Attack: Indian Variation | |
| Apr 16, 2026 | Goluch | ½–½ | Pierzak | new tournament description | Scandinavian Defense: Mieses-Kotroc Variation | |
| Apr 14, 2026 | Pierzak | 1–0 | Lopusiewicz | new tournament description | English Opening: Caro-Kann Defensive System | |
| Apr 14, 2026 | Wieczorek | 1–0 | Pierzak | new tournament description | Hungarian Opening | |
| Apr 13, 2026 | Pierzak | * | Trystula | new tournament description | Queen's Gambit Declined: Three Knights Variation | |
| Apr 12, 2026 | Kopacz | 1–0 | Pierzak | new tournament description | Nimzo-Larsen Attack: Modern Variation | |
| Apr 11, 2026 | Pierzak | 1–0 | Baj | new tournament description | Ware Opening: Symmetric Variation | |
| Apr 13, 2025 | Wawrzyniak | 1–0 | Pierzak | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | Zukertort Opening | |
| Apr 12, 2025 | Pierzak | 1–0 | Klonowski | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | French Defense: Winawer Variation, Maróczy-Wallis Variation | |
| Apr 12, 2025 | Mackowiak | ½–½ | Pierzak | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | Polish Opening: Outflank Variation | |
| Apr 10, 2025 | Pierzak | 1–0 | Kruszynski | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | Sicilian Defense: Modern Variations | |
| Apr 7, 2025 | Shakhnovich | 1–0 | Pierzak | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | Scandinavian Defense: Gubinsky-Melts Defense | |
| Apr 6, 2025 | Pierzak | ½–½ | Bajno | Columbus Mistrzostwa Polski Amatorów - do 1900 FIDE | Bogo-Indian Defense: Retreat Variation | |
| Aug 17, 2024 | Pierzak | ½–½ | Marekwica | Open C | Sicilian Defense: Hyperaccelerated Dragon | |
| Aug 16, 2024 | Bialek | 1–0 | Pierzak | Open C | Scandinavian Defense: Gubinsky-Melts Defense | |
| Aug 15, 2024 | Pierzak | * | Slobodzian | Open C | English Opening: King's English Variation, Closed System, Full Symmetry | |
| Aug 14, 2024 | Ilski | ½–½ | Pierzak | Open C | French Defense: Exchange Variation, Monte Carlo Variation | |
| Aug 13, 2024 | Pierzak | ½–½ | Kolasinski | Open C | Indian Defense: Spielmann-Indian | |
| Aug 12, 2024 | Pierzak | 1–0 | Zahorodny | Open C | King's Indian Defense: Sämisch Variation, Normal Defense | |
| Aug 12, 2024 | Skorek | 0–1 | Pierzak | Open C | Pirc Defense | |
| Aug 11, 2024 | Szachniewicz | 0–1 | Pierzak | Open C | English Opening: Agincourt Defense | |
| Aug 10, 2024 | Pierzak | 1–0 | Mroz | Open C | Italian Game: Deutz Gambit | |
| Apr 21, 2024 | Pierzak | ½–½ | Iwan | MPA 1820 2024 | King's Indian Defense: Semi-Classical Variation, Hollywood Variation | |
| Apr 20, 2024 | Pierzak | ½–½ | Hombek | MPA 1820 2024 | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Apr 19, 2024 | Pietras | ½–½ | Pierzak | MPA 1820 2024 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 17, 2024 | Czepczynski | 1–0 | Pierzak | MPA 1820 2024 | English Opening: Carls-Bremen System | |
| Apr 16, 2024 | Pierzak | 1–0 | Warsinski | MPA 1820 2024 | Semi-Slav Defense: Normal Variation | |
| Apr 15, 2024 | Haluja | 1–0 | Pierzak | MPA 1820 2024 | Scandinavian Defense: Gubinsky-Melts Defense | |
| Apr 14, 2024 | Pierzak | ½–½ | Stepien | MPA 1820 2024 | French Defense: King's Indian Attack | |
| Apr 13, 2024 | Olej | 0–1 | Pierzak | MPA 1820 2024 | Zukertort Opening | |
| Sep 4, 2021 | Bielczyk | ½–½ | Pierzak | Polish League Division 1 | Caro-Kann Defense: Exchange Variation | |
| — | Pierzak | 1–0 | Bojczuk | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | English Opening: King's English Variation, Two Knights Variation, Reversed Dragon | |
| — | Pierzak | ½–½ | Skorupa | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Slav Defense: Three Knights Variation | |
| — | Pierzak | ½–½ | Wozniak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | French Defense: King's Indian Attack | |
| — | Pierzak | 1–0 | Narwojsz | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | French Defense: Rubinstein Variation, Kasparov Attack | |
| — | Ryba | 0–1 | Pierzak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Scandinavian Defense: Gubinsky-Melts Defense | |
| — | Twardziak | ½–½ | Pierzak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Polish Opening | |
| — | Janeczek | 0–1 | Pierzak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Caro-Kann Defense: Exchange Variation | |
| — | Krakowiak | 0–1 | Pierzak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Old Indian Defense | |
| — | Fajks | 1–0 | Pierzak | 61. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN D | Caro-Kann Defense: Classical Variation, Spassky Variation | |
