| Oct 4, 2025 | Olszewski | 1–0 | Derejczyk | MP-rapid25 | Caro-Kann Defense: Advance Variation, Short Variation | |
| Oct 4, 2025 | Derejczyk | 0–1 | Korszanski | MP-rapid25 | English Opening | |
| Sep 13, 2025 | Derejczyk | 0–1 | Majdanski | TCQ | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| Sep 13, 2025 | Sieciechowicz | 1–0 | Derejczyk | TCQ | Queen's Gambit Declined: Charousek Variation | |
| Sep 13, 2025 | Derejczyk | 1–0 | Jablonski | TCQ | English Opening: Symmetrical Variation, Two Knights Variation | |
| Sep 13, 2025 | Pakleza | 1–0 | Derejczyk | TCQ | Queen's Pawn Game: London System | |
| Sep 13, 2025 | Derejczyk | 1–0 | Stefanowski | TCQ | English Opening: Symmetrical Variation | |
| Sep 13, 2025 | Wojdak | ½–½ | Derejczyk | TCQ | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Sep 7, 2025 | Kasperkiewicz | 0–1 | Derejczyk | 2 liga 2025 1 | Caro-Kann Defense: Panov Attack, Main Line | |
| Sep 6, 2025 | Derejczyk | 0–1 | Mikula | 2 liga 2025 2 | English Opening: King's English Variation | |
| Sep 5, 2025 | Derejczyk | 1–0 | Basiaga | 2 liga 2025 2 | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| Sep 4, 2025 | Carrieri | 1–0 | Derejczyk | 2liga_2025_3 | Caro-Kann Defense: Advance Variation, Short Variation | |
| Sep 3, 2025 | Safanowski | 0–1 | Derejczyk | 2liga_2025_3 | Queen's Pawn Game: Colle System | |
| Sep 2, 2025 | Derejczyk | 0–1 | Dembicki | 2 liga 2025 2 | English Opening: King's English Variation | |
| Sep 1, 2025 | Derejczyk | 0–1 | Wasik | 2liga_2025_3 | King's Indian Defense: Orthodox Variation | |
| Aug 25, 2024 | Derejczyk | 1–0 | Jacel | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: Anglo-Lithuanian Variation | |
| Aug 24, 2024 | Szydelko | ½–½ | Derejczyk | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Aug 23, 2024 | Derejczyk | 1–0 | Palacz | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: King's English Variation, Closed System | |
| Aug 22, 2024 | Hiren K G | 1–0 | Derejczyk | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | Caro-Kann Defense: Panov Attack, Main Line | |
| Aug 21, 2024 | Derejczyk | 1–0 | Ramakrishnan M R | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: King's English Variation | |
| Aug 20, 2024 | Derejczyk | 1–0 | Rzeznik | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Aug 19, 2024 | Zerebiec | 1–0 | Derejczyk | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: Four Knights System, Nimzowitsch Variation | |
| Aug 18, 2024 | Derejczyk | ½–½ | Krzywnicka | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | English Opening: King's English Variation, Closed System | |
| Aug 17, 2024 | Ziobrowska | 0–1 | Derejczyk | 60. Jubileuszowy Mi?dzynarodowy Festiwal Szachowy Akiby Rubinsteina - OPEN B | Caro-Kann Defense: Advance Variation, Short Variation | |
| Mar 24, 2024 | Aliavdin | 1–0 | Derejczyk | Round 10: Aliavdin, Nikolai - Derejczyk, Mateusz | Caro-Kann Defense: Advance Variation, Short Variation | |
| Mar 24, 2024 | Derejczyk | 0–1 | Strawa | Round 9: Derejczyk, Mateusz - Strawa, Jakub | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Mar 23, 2024 | Derejczyk | ½–½ | Koziorowicz | Round 5: Derejczyk, Mateusz - Koziorowicz, Michal | English Opening: Jaenisch Gambit | |
| Dec 16, 2022 | Derejczyk | 1–0 | Asllani | ebrcc2022 | Scotch Game: Classical Variation | |
| Dec 16, 2022 | Asllani | 1–0 | Derejczyk | ebrcc2022 | Caro-Kann Defense: Classical Variation, Spassky Variation | |
| Dec 19, 2021 | Derejczyk | 0–1 | Niedbala | ME rapid 2021 | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Dec 19, 2021 | Cukrowski | ½–½ | Derejczyk | ME rapid 2021 | King's Indian Attack: Keres Variation | |
| — | Derejczyk | 1–0 | Kruszelnicki | Memorial Adolfa Anderssena 2025 | English Opening: Mikenas-Carls Variation | |
| — | Derejczyk | 0–1 | Hulka | anderssen2025 | English Opening: King's English Variation | |
| — | Derejczyk | 1–0 | Patera | anderssen2025 | English Opening: King's English Variation | |
| — | Derejczyk | 1–0 | Pietrzak | anderssen2025 | French Defense: Exchange Variation, Monte Carlo Variation | |
| — | Derejczyk | 0–1 | Kowalski | Round 2: Derejczyk, Mateusz - Kowalski, Igor | ? | |
| — | Derejczyk | 1–0 | Szymon Sikora | Round 4: Derejczyk, Mateusz - Szymon Sikora | ? | |
| — | Derejczyk | 0–1 | Bienias | Round 6: Derejczyk, Mateusz - Bienias, Piotr | ? | |
| — | Derejczyk | 1–0 | Czachor | Round 8: Derejczyk, Mateusz - Czachor, Radoslaw | ? | |
| — | Derejczyk | 1–0 | Malik | Round 9: Derejczyk, Mateusz - Malik, Maciej | ? | |
| — | Derejczyk | ½–½ | Lonski | C18b | English Opening: Symmetrical Variation | |
| — | Derejczyk | 0–1 | Grot | C18b | Sicilian Defense: Kramnik Variation | |
| — | Derejczyk | 1–0 | Kutowski | Rubinstein Chess Festival 2025 - OPEN A | English Opening: King's English Variation | |
| — | Derejczyk | 0–1 | Mickiewicz | Rubinstein Chess Festival 2025 - OPEN A | English Opening: Great Snake Variation | |
| — | Derejczyk | 1–0 | Lecki | Rubinstein Chess Festival 2025 - OPEN A | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| — | Derejczyk | 0–1 | Szymkiewicz | Rubinstein Chess Festival 2025 - OPEN A | English Opening: King's English Variation | |
| — | Derejczyk | ½–½ | Leszczewicz | Rubinstein Chess Festival 2025 - OPEN A | French Defense: Exchange Variation, Monte Carlo Variation | |
| — | Rzewnicki | 0–1 | Derejczyk | Memorial Adolfa Anderssena 2025 | Catalan Opening: Closed Variation, Traditional Variation | |
| — | Jankowski | 0–1 | Derejczyk | anderssen2025 | Catalan Opening: Closed | |
| — | Raczek | 1–0 | Derejczyk | anderssen2025 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| — | Zienkiewicz | 1–0 | Derejczyk | anderssen2025 | Queen's Pawn Game: London System | |
| — | Stachowiak | 1–0 | Derejczyk | anderssen2025 | Queen's Gambit Declined: Modern Variation, Normal Line | |
| — | Kacper Cieslik | 0–1 | Derejczyk | Round 1: Kacper Cieslik - Derejczyk, Mateusz | ? | |
| — | Was | 1–0 | Derejczyk | Round 3: Was, Stanislaw - Derejczyk, Mateusz | ? | |
| — | Draganik | 0–1 | Derejczyk | Round 5: Draganik, Grzegorz - Derejczyk, Mateusz | ? | |
| — | Krawiec | 0–1 | Derejczyk | Round 7: Krawiec, Grzegorz - Derejczyk, Mateusz | ? | |
| — | Wieckowski | ½–½ | Derejczyk | C18b | Caro-Kann Defense: Advance Variation, Short Variation | |
| — | Maslanka | 1–0 | Derejczyk | C18b | Caro-Kann Defense: Advance Variation, Tal Variation | |
| — | Liskiewicz | ½–½ | Derejczyk | Rubinstein Chess Festival 2025 - OPEN A | Queen's Gambit Declined: Charousek Variation | |
| — | Smietanska | ½–½ | Derejczyk | Rubinstein Chess Festival 2025 - OPEN A | English Opening: King's English Variation, Four Knights Variation, Korchnoi Line | |
| — | Nagly | 1–0 | Derejczyk | Rubinstein Chess Festival 2025 - OPEN A | Queen's Gambit Declined: Charousek Variation | |
| — | Pyrek | ½–½ | Derejczyk | Rubinstein Chess Festival 2025 - OPEN A | Queen's Gambit Declined: Charousek Variation | |