| Jun 30, 2026 | Kopacki | 1–0 | Stepinski | XXII Baltic Pearl Chess Festival 2026 - Group A 1-20 | Caro-Kann Defense | |
| Jun 29, 2026 | Opalka | 0–1 | Kopacki | XXII Baltic Pearl Chess Festival 2026 - Group A 1-20 | Queen's Pawn Game: Colle System | |
| Jun 28, 2026 | Kopacki | 1–0 | Baczek | XXII Baltic Pearl Chess Festival 2026 - Group A 1-20 | Sicilian Defense: Chekhover Variation | |
| May 29, 2026 | Wilman | 0–1 | Kopacki | II DMP Juniorow 2026 | Caro-Kann Defense: Classical Variation | |
| May 28, 2026 | Kopacki | 1–0 | Dzierzko | II DMP Juniorow 2026 | Sicilian Defense: Prins Variation, Venice Attack | |
| May 27, 2026 | Uryga | ½–½ | Kopacki | II DMP Juniorow 2026 | Sicilian Defense: Alapin Variation, Barmen Defense | |
| May 26, 2026 | Kopacki | ½–½ | Bialkowski | II DMP Juniorow 2026 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 25, 2026 | Kolodziej | ½–½ | Kopacki | II DMP Juniorow 2026 | Caro-Kann Defense: Classical Variation | |
| May 24, 2026 | Niec | 0–1 | Kopacki | II DMP Juniorow 2026 | Semi-Slav Defense: Chigorin Defense | |
| May 23, 2026 | Kopacki | 1–0 | Reterski | II DMP Juniorow 2026 | Sicilian Defense: Kalashnikov Variation | |
| May 22, 2026 | Kunikowski | 0–1 | Kopacki | II DMP Juniorow 2026 | Sicilian Defense: Classical Variation | |
| May 21, 2026 | Kopacki | ½–½ | Owczarek | II DMP Juniorow 2026 | French Defense: Tarrasch Variation, Morozevich Variation | |
| Sep 7, 2025 | Kopacki | ½–½ | Watorek | 2 liga 2025 2 | Slav Defense | |
| Sep 6, 2025 | Walaszczyk | ½–½ | Kopacki | 2 liga 2025 2 | Indian Defense: Tartakower Attack | |
| Sep 5, 2025 | Kopacki | 1–0 | Gulbinski | 2 liga 2025 2 | Semi-Slav Defense | |
| Sep 4, 2025 | Bartlomowicz | ½–½ | Kopacki | 2 liga 2025 2 | Caro-Kann Defense: Classical Variation, Main Line | |
| Sep 2, 2025 | Kopacki | 0–1 | Rudecki | 2 liga 2025 2 | Four Knights Game: Spanish Variation, Symmetrical Variation | |
| Sep 1, 2025 | Fic | ½–½ | Kopacki | 2 liga 2025 2 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Jul 11, 2025 | Osinchuk | ½–½ | Kopacki | Round 7: Osinchuk, Luka - Kopacki, Aleksander | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jul 10, 2025 | Kopacki | 1–0 | Verbic | Round 6: Kopacki, Aleksander - Verbic, Jan | Caro-Kann Defense: Two Knights Attack | |
| Jul 9, 2025 | Kopacki | 0–1 | Minga-Nagy | Round 5: Kopacki, Aleksander - Minga-Nagy, Abel Inti | English Opening: King's English Variation, Two Knights Variation | |
| Jul 8, 2025 | Oz | 1–0 | Kopacki | Round 4: Oz, Ege - Kopacki, Aleksander | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jul 7, 2025 | Kopacki | 0–1 | Pasula | Round 3: Kopacki, Aleksander - Pasula, Milos | Modern Defense: Three Pawns Attack | |
| Jul 6, 2025 | Krstic | 0–1 | Kopacki | Round 2: Krstic, David - Kopacki, Aleksander | Catalan Opening: Open Defense, Classical Line | |
| Jul 5, 2025 | Kopacki | 1–0 | Busic | Round 1: Kopacki, Aleksander - Busic, Mateo | Sicilian Defense: Taimanov Variation | |
| Jun 22, 2025 | Kopacki | 1–0 | Korszanski | DMPJ Ekstraliga 2025 | Four Knights Game: Gunsberg Variation | |
| Jun 21, 2025 | Mroczkowski | ½–½ | Kopacki | DMPJ Ekstraliga 2025 | Sicilian Defense: Richter-Rauzer Variation | |
| Jun 20, 2025 | Kopacki | 0–1 | Ladon | DMPJ Ekstraliga 2025 | Sicilian Defense: Kalashnikov Variation | |
| Jun 19, 2025 | Ochedzan | 1–0 | Kopacki | DMPJ Ekstraliga 2025 | Caro-Kann Defense: Classical Variation, Main Line | |
| Jun 18, 2025 | Kopacki | 0–1 | Radzimski | DMPJ Ekstraliga 2025 | Four Knights Game: Spanish Variation | |
| Jun 17, 2025 | Wons | ½–½ | Kopacki | DMPJ Ekstraliga 2025 | Indian Defense: Normal Variation | |
| Jun 16, 2025 | Kopacki | 1–0 | Dobrowolski | DMPJ Ekstraliga 2025 | Philidor Defense: Exchange Variation | |
| Jun 15, 2025 | Karaszewski | 0–1 | Kopacki | DMPJ Ekstraliga 2025 | Bogo-Indian Defense: Grünfeld Variation | |
| Jun 14, 2025 | Kopacki | ½–½ | Obrycki | DMPJ Ekstraliga 2025 | Sicilian Defense: Chekhover Variation | |
| Jan 10, 2025 | Mannion | 1–0 | Kopacki | praha2025 | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| Sep 8, 2024 | Rosicki | ½–½ | Kopacki | 2liga-2 | Queen's Pawn Game: London System | |
| Sep 7, 2024 | Kopacki | 1–0 | Borowski | 2liga-2 | Sicilian Defense: O'Kelly Variation, Venice System | |
| Sep 6, 2024 | Kopacki | 1–0 | Karpinski | 2liga-3 | Pirc Defense: Austrian Attack, Dragon Formation | |
| Sep 5, 2024 | Olszewski | 0–1 | Kopacki | 2liga-3 | Sicilian Defense: Chekhover Variation | |
| Sep 4, 2024 | Jedynak | 1–0 | Kopacki | 2liga-2 | Sicilian Defense: Old Sicilian | |
| Sep 3, 2024 | Kopacki | 1–0 | Lochina | 2liga-3 | Sicilian Defense: Taimanov Variation, Normal Variation | |
| Sep 2, 2024 | Przerwa | 0–1 | Kopacki | 2liga-2 | Sicilian Defense: Richter-Rauzer Variation | |
| Sep 1, 2024 | Kopacki | 0–1 | Swiatnicki | DMP II LIga 2024 1 | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Aug 31, 2024 | Duda | ½–½ | Kopacki | DMP II LIga 2024 1 | Bird Opening: Dutch Variation | |
| Aug 20, 2024 | Kopacki | 1–0 | Negrean | EYCC 2024 Blitz O12 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Aug 20, 2024 | Kopacki | 0–1 | Honcharov | EYCC 2024 Blitz O12 | Sicilian Defense: Modern Variations | |
| Aug 20, 2024 | Kopacki | 1–0 | Gersemann | EYCC 2024 Blitz O12 | Sicilian Defense: Modern Variations | |
| Aug 20, 2024 | Kopacki | 0–1 | Velychko | EYCC 2024 Blitz O12 | Sicilian Defense: Kalashnikov Variation | |
| Aug 20, 2024 | Kopacki | 0–1 | Achinovich | EYCC 2024 Blitz O12 | French Defense: Two Knights Variation | |
| Aug 20, 2024 | Negrean | 1–0 | Kopacki | EYCC 2024 Blitz O12 | King's Indian Attack | |
| Aug 20, 2024 | Honcharov | 1–0 | Kopacki | EYCC 2024 Blitz O12 | Sicilian Defense: Modern Variations | |
| Aug 20, 2024 | Gersemann | 1–0 | Kopacki | EYCC 2024 Blitz O12 | Sicilian Defense: Sozin Attack, Leonhardt Variation | |
| Aug 20, 2024 | Velychko | 1–0 | Kopacki | EYCC 2024 Blitz O12 | Queen's Pawn Game: Chigorin Variation, Irish Gambit | |
| Aug 20, 2024 | Achinovich | 1–0 | Kopacki | EYCC 2024 Blitz O12 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Aug 19, 2024 | Kopacki | 1–0 | Bara | EYCC 2024 Blitz O12 | Sicilian Defense: Modern Variations | |
| Aug 19, 2024 | Kopacki | 1–0 | Kostiak | EYCC 2024 Blitz O12 | French Defense: Two Knights Variation | |
| Aug 19, 2024 | Bara | 1–0 | Kopacki | EYCC 2024 Blitz O12 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Aug 19, 2024 | Kostiak | 0–1 | Kopacki | EYCC 2024 Blitz O12 | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Aug 18, 2024 | Kopacki | ½–½ | Korszanski | EYCC 2024 Rapid O12 | Center Game: Berger Variation | |
| Aug 18, 2024 | Kopacki | 0–1 | Velim | EYCC 2024 Rapid O12 | Caro-Kann Defense: Two Knights Attack | |
| Aug 18, 2024 | Krstic | 0–1 | Kopacki | EYCC 2024 Rapid O12 | English Opening: King's English Variation, Two Knights Variation, Reversed Dragon | |
| Aug 18, 2024 | Vardi | 1–0 | Kopacki | EYCC 2024 Rapid O12 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Aug 17, 2024 | Kopacki | 1–0 | Bara | EYCC 2024 Rapid O12 | Sicilian Defense: Modern Variations | |
| Aug 17, 2024 | Kopacki | ½–½ | Negrean | EYCC 2024 Rapid O12 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Aug 17, 2024 | Velychko | ½–½ | Kopacki | EYCC 2024 Rapid O12 | Blackmar-Diemer Gambit: Reversed Albin Countergambit | |
| Aug 17, 2024 | Achinovich | ½–½ | Kopacki | EYCC 2024 Rapid O12 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Aug 3, 2024 | Kopacki | ½–½ | Sniedziewski | Rapid C12 | French Defense: Two Knights Variation | |
| Aug 3, 2024 | Kopacki | ½–½ | Brzezina | Rapid C12 | Center Game: Paulsen Attack Variation | |
| Aug 3, 2024 | Toczylowski | 0–1 | Kopacki | Rapid C12 | Sicilian Defense: Sozin Attack, Leonhardt Variation | |
| Aug 2, 2024 | Kopacki | 1–0 | Jamka | Rapid C12 | Sicilian Defense: Lasker-Pelikan Variation, Bird Variation | |
| Aug 2, 2024 | Golis | 1–0 | Kopacki | Rapid C12 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| May 4, 2024 | Michal Kurczyna | * | Kopacki | Round 7: Michal Kurczyna - Kopacki, Aleksander | ? | |
| May 3, 2024 | Kulpinski | * | Kopacki | Round 6: Kulpinski, Maciej - Kopacki, Aleksander | ? | |
| May 3, 2024 | Kopacki | * | Dietrich | Round 5: Kopacki, Aleksander - Dietrich, Pawel | ? | |
| May 2, 2024 | Choroszej | 1–0 | Kopacki | Round 4: Choroszej, Aleksander - Kopacki, Aleksander | Queen's Gambit Declined: Janowski Variation | |
| May 2, 2024 | Kopacki | * | Mikolajski | Round 3: Kopacki, Aleksander - Mikolajski, Marcin | ? | |
| May 1, 2024 | Budnik | 1–0 | Kopacki | Round 2: Budnik, Mateusz - Kopacki, Aleksander | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 1, 2024 | Kopacki | * | Schreiber | Round 1: Kopacki, Aleksander - Schreiber, Anna | ? | |
| Oct 24, 2023 | Kopacki | 0–1 | Menke | WCCC 2023 - Open U10 | Four Knights Game: Spanish Variation | |
| — | Kopacki | 1–0 | Banach | Mistrzostwa Polski Juniorów w szachach szybkich c12 | French Defense: Two Knights Variation | |
| — | Kopacki | 0–1 | Gorka | Mistrzostwa Polski Juniorów w szachach szybkich c12 | French Defense: Two Knights Variation | |
| — | Kopacki | ½–½ | Kucewicz | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Caro-Kann Defense: Tartakower Variation | |
| — | Kopacki | 1–0 | Piotrowski | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| — | Kopacki | 1–0 | Machaj | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| — | Kopacki | 1–0 | Gancarz | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Sicilian Defense: O'Kelly Variation, Venice System | |
| — | Kopacki | 1–0 | Machaj | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Four Knights Game: Gunsberg Variation | |
| — | Kopacki | 1–0 | Buklaho | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| — | Kopacki | 1–0 | Cieslik | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| — | Kopacki | ½–½ | Sniedziewski | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | English Opening: Agincourt Defense | |
| — | Kopacki | 1–0 | Serafin | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Sicilian Defense: Old Sicilian | |
| — | Kopacki | 0–1 | Nakonechnyi | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Sicilian Defense: Chekhover Variation | |
| — | Kopacki | 0–1 | Zerebiec | Rubinstein Chess Festival 2025 - OPEN A | French Defense: Tarrasch Variation, Morozevich Variation | |
| — | Kopacki | ½–½ | Kawulski-Chodkiewicz | Rubinstein Chess Festival 2025 - OPEN A | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| — | Kopacki | 0–1 | Darowicki | Rubinstein Chess Festival 2025 - OPEN A | Caro-Kann Defense: Two Knights Attack | |
| — | Kopacki | 0–1 | Lasok | Rubinstein Chess Festival 2025 - OPEN A | Sicilian Defense: O'Kelly Variation, Venice System | |
| — | Trybek | 0–1 | Kopacki | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Queen's Pawn Game: Accelerated London System | |
| — | Lewinski | 0–1 | Kopacki | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Sicilian Defense: Closed | |
| — | Bednarek | 1–0 | Kopacki | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| — | Szeszycki | ½–½ | Kopacki | Mistrzostwa Polski Juniorów w szachach szybkich c12 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| — | Gorecki | 0–1 | Kopacki | Mistrzostwa Polski Juniorów w szachach b?yskawicznych C12 | Sicilian Defense: Classical Variation | |