| Dec 30, 2025 | Maciejewski | 1–0 | Filimoniuk | Runda 9: Maciejewski, Kamil - Filimoniuk, Marcin | Hungarian Opening | |
| Dec 30, 2025 | Olejko | ½–½ | Maciejewski | Runda 8: Olejko, Wojciech - Maciejewski, Kamil | Catalan Opening: Open Defense, Modern Sharp Variation | |
| Dec 30, 2025 | Jaszczuk | 1–0 | Maciejewski | Runda 7: Jaszczuk, Piotr - Maciejewski, Kamil | Ruy Lopez: Closed | |
| Dec 29, 2025 | Maciejewski | 1–0 | Kalus | Runda 6: Maciejewski, Kamil - Kalus, Franciszek | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Dec 29, 2025 | Kicinski | 1–0 | Maciejewski | Runda 5: Kicinski, Jacek - Maciejewski, Kamil | Queen's Pawn Game: Torre Attack | |
| Dec 28, 2025 | Maciejewski | 1–0 | Wnorowski | Runda 4: Maciejewski, Kamil - Wnorowski, Wiktor | King's Indian Attack: Yugoslav Variation | |
| Dec 27, 2025 | Wons | ½–½ | Maciejewski | Runda 3: Wons, Krystian - Maciejewski, Kamil | Indian Defense: Normal Variation | |
| Dec 27, 2025 | Maciejewski | ½–½ | Kultucki | Runda 2: Maciejewski, Kamil - Kultucki, Kamil | King's Indian Attack | |
| Dec 27, 2025 | Lenkov | ½–½ | Maciejewski | Runda 1: Lenkov, Stanislav - Maciejewski, Kamil | Philidor Defense: Lion Variation | |
| Sep 21, 2025 | Maciejewski | 1–0 | Nadzamova | exe:Slovakia open Bratislava 25 | Hungarian Opening | |
| Sep 20, 2025 | Oruzinsky | 0–1 | Maciejewski | exe:Slovakia open Bratislava 25 | Philidor Defense: Lion Variation | |
| Sep 19, 2025 | Maciejewski | 1–0 | Reichel | exe:Slovakia open Bratislava 25 | Zukertort Opening: Reversed Grünfeld | |
| Sep 18, 2025 | Guba | 0–1 | Maciejewski | exe: | English Opening: Symmetrical Variation, Three Knights Variation | |
| Sep 17, 2025 | Maciejewski | ½–½ | Kucera | exe: | Nimzo-Larsen Attack: Modern Variation | |
| Sep 16, 2025 | Fudala | 1–0 | Maciejewski | exe:Slovakia open Bratislava 25 | Petrov's Defense: Classical Attack, Staunton Variation | |
| Sep 15, 2025 | Maciejewski | ½–½ | Simon | exe:Slovakia open Bratislava 25 | Nimzo-Larsen Attack | |
| Sep 14, 2025 | Snehal | 1–0 | Maciejewski | exe:Slovakia open Bratislava 25 | Queen's Pawn Game | |
| Sep 13, 2025 | Maciejewski | 1–0 | Chmurny | exe:Slovakia open Bratislava 25 | English Opening: Agincourt Defense, Wimpy System | |
| May 4, 2024 | Tokarz | 1–0 | Maciejewski | Round 7: Tokarz, Izabela - Maciejewski, Kamil | Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation | |
| May 3, 2024 | Maciejewski | 1–0 | Mukherjee Bratajit | Round 6: Maciejewski, Kamil - Mukherjee Bratajit | King's Indian Attack | |
| May 3, 2024 | Osinski | 0–1 | Maciejewski | Round 5: Osinski, Tomasz - Maciejewski, Kamil | Sicilian Defense: Closed, Traditional | |
| May 2, 2024 | Maciejewski | ½–½ | Adam Borkowski | Round 4: Maciejewski, Kamil - Adam Borkowski | Réti Opening: Anglo-Slav Variation, Bogoljubow Variation | |
| May 2, 2024 | Biesiadecki | ½–½ | Maciejewski | Round 3: Biesiadecki, Adam - Maciejewski, Kamil | Nimzo-Indian Defense: Normal Variation | |
| May 1, 2024 | Maciejewski | ½–½ | Bociek | Round 2: Maciejewski, Kamil - Bociek, Piotr | King's Indian Attack: Keres Variation | |
| May 1, 2024 | Kopia | 0–1 | Maciejewski | Round 1: Kopia, Julian - Maciejewski, Kamil | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Sep 22, 2024 | Maciejewski | 1–0 | Liptak | exe:Slovakia Open 24 | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Sep 21, 2024 | Goga | ½–½ | Maciejewski | exe:Slovakia Open 24 | Sicilian Defense: Smith-Morra Gambit | |
| Sep 20, 2024 | Butenandt | 1–0 | Maciejewski | exe:Slovakia Open 24 | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | |
| Sep 19, 2024 | Maciejewski | 0–1 | Gombocz | exe:Slovakia Open 24 | Nimzo-Larsen Attack: Classical Variation | |
| Sep 18, 2024 | Maciejewski | 1–0 | Grebennikov | exe:Slovakia Open 24 | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Sep 17, 2024 | Sernecki | 1–0 | Maciejewski | exe:Slovakia Open 24 | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Sep 16, 2024 | Nemitz | 0–1 | Maciejewski | exe:Slovakia Open 24 | Zukertort Opening: Sicilian Invitation | |
| Sep 15, 2024 | Maciejewski | ½–½ | Zetocha | exe:Slovakia Open 24 | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Sep 14, 2024 | Maciejewski | 1–0 | Stocek | exe:Slovakia Open 24 | King's Indian Attack | |
| Dec 17, 2021 | Maciejewski | 0–1 | Brodowski | European Blitz Chess Championship 2021 | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Dec 13, 2021 | Maciejewski | 1–0 | Karut | IMP20b | Zukertort Opening: Reversed Grünfeld | |
| Dec 12, 2021 | Panek | 1–0 | Maciejewski | IMP20b | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 11, 2021 | Maciejewski | 1–0 | Sidorczuk | IMP20b | King's Indian Attack: Sicilian Variation | |
| Dec 10, 2021 | Jarzebowski | 1–0 | Maciejewski | IMP20b | Indian Defense: Tartakower Attack | |
| Dec 9, 2021 | Maciejewski | 1–0 | Marciniak | IMP20b | King's Indian Attack | |
| Dec 8, 2021 | Rog | 1–0 | Maciejewski | U20 Polish Youth Championship | English Opening: Mikenas-Carls Variation | |
| Dec 7, 2021 | Kocierz | 0–1 | Maciejewski | IMP20b | English Opening: King's English Variation, Troger Defense | |
| Dec 6, 2021 | Maciejewski | 0–1 | Kacprzak | IMP20b | Zukertort Opening | |
| Dec 6, 2021 | Maciejewski | 0–1 | Janeczko | IMP20b | English Opening: Symmetrical Variation | |
