| Jun 27, 2026 | Klimkowski | 1–0 | Mickiewicz | Macieja Memorial | Zukertort Opening: Nimzo-Larsen Variation | |
| Jun 27, 2026 | Kokoszczynski | 1–0 | Klimkowski | Macieja Memorial | King's Indian Attack | |
| Jun 27, 2026 | Klimkowski | 1–0 | Baum | Macieja Memorial | Nimzo-Larsen Attack: Classical Variation | |
| Jun 27, 2026 | Lapaj | 0–1 | Klimkowski | Macieja Memorial | Sicilian Defense: Closed | |
| Jun 27, 2026 | Klimkowski | ½–½ | Paszewski | Macieja Memorial | Nimzo-Larsen Attack: Classical Variation | |
| Jun 27, 2026 | Mulawa | 1–0 | Klimkowski | Macieja Memorial | English Opening: Agincourt Defense, Wimpy System | |
| Jun 27, 2026 | Klimkowski | 0–1 | Karolczuk | Macieja Memorial | Nimzo-Larsen Attack: Classical Variation | |
| Jun 27, 2026 | Rudnev | 0–1 | Klimkowski | Macieja Memorial | King's Pawn Game: Tayler Opening, Inverted Hanham | |
| Jun 27, 2026 | Klimkowski | 1–0 | Gahan M G | Macieja Memorial | Nimzo-Larsen Attack: Classical Variation | |
| Jun 27, 2026 | Stachniak | 0–1 | Klimkowski | Macieja Memorial | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Jun 27, 2026 | Klimkowski | 1–0 | Wolak | Macieja Memorial | Zukertort Opening: Nimzo-Larsen Variation | |
| Jun 24, 2026 | Klimkowski | ½–½ | Gumularz | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Zukertort Opening: Sicilian Invitation | |
| Jun 22, 2026 | Klimkowski | ½–½ | Terkiewicz | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Nimzo-Larsen Attack: Classical Variation | |
| Jun 21, 2026 | Klekowski | ½–½ | Klimkowski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Zukertort Opening | |
| Jun 20, 2026 | Klimkowski | ½–½ | Niedbala | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Nimzo-Larsen Attack: Classical Variation | |
| Jun 19, 2026 | Lagarde | 1–0 | Klimkowski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Queen's Gambit Declined: Modern Variation | |
| Jun 18, 2026 | Kazakouski | 1–0 | Klimkowski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Queen's Gambit Declined: Modern Variation | |
| Jun 17, 2026 | Klimkowski | ½–½ | Antoniewski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jun 16, 2026 | Finek | 0–1 | Klimkowski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Catalan Opening: Open Defense | |
| Apr 19, 2026 | Schoppen | ½–½ | Klimkowski | EICC 2026 | King's Indian Attack, with e6 | |
| Apr 18, 2026 | Klimkowski | ½–½ | Iturrizaga Bonelli | EICC 2026 | Sicilian Defense: Kalashnikov Variation | |
| Apr 16, 2026 | Yuffa | 0–1 | Klimkowski | EICC 2026 | English Opening: Mikenas-Carls Variation | |
| Apr 15, 2026 | Klimkowski | 1–0 | Borrmann | EICC 2026 | English Opening: Agincourt Defense | |
| Apr 14, 2026 | kiladze | ½–½ | Klimkowski | EICC 2026 | Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order | |
| Apr 13, 2026 | Klimkowski | 0–1 | Dardha | EICC 2026 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Apr 12, 2026 | Sason | 0–1 | Klimkowski | EICC 2026 | Ruy Lopez: Morphy Defense, Duras Variation | |
| Apr 10, 2026 | Klimkowski | ½–½ | Ivanchuk | EICC 2026 | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Apr 9, 2026 | Gurel | ½–½ | Klimkowski | EICC 2026 | Ruy Lopez: Open, Classical Defense, Main Line | |
| Apr 8, 2026 | Klimkowski | 1–0 | Unat | EICC 2026 | Sicilian Defense: Lasker-Pelikan Variation | |
| Apr 7, 2026 | Sertbay | 0–1 | Klimkowski | EICC 2026 | Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation | |
| Mar 18, 2026 | Krstulovic | ½–½ | Klimkowski | Round 3: Krstulovic, Alex - Klimkowski, Jan | Queen's Gambit Declined: Westphalian Variation | |
| Mar 18, 2026 | Klimkowski | 0–1 | Bosiocic | Round 2: Klimkowski, Jan - Bosiocic, Marin | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Mar 18, 2026 | Sieciechowicz | ½–½ | Klimkowski | Round 1: Sieciechowicz, Marcin - Klimkowski, Jan | Queen's Gambit Declined: Barmen Variation | |
| Mar 18, 2026 | Klimkowski | 0–1 | Holt | 2026 Chesscom Open Play In 2 | French Defense: Winawer Variation, Advance Variation, with h4 | |
| Mar 18, 2026 | Bologan | 0–1 | Klimkowski | 2026 Chesscom Open Play In 2 | Sicilian Defense: Najdorf Variation, English Attack | |
| Mar 18, 2026 | Moroni | 1–0 | Klimkowski | 2026 Chesscom Open Play In 2 | King's Indian Defense: Normal Variation | |
| Mar 18, 2026 | Klimkowski | 0–1 | Caruana | 2026 Chesscom Open Play In 2 | King's Indian Defense: Semi-Averbakh System | |
| Mar 18, 2026 | Klimkowski | ½–½ | Svane | 2026 Chesscom Open Play In 2 | Slav Defense: Quiet Variation, Schallopp Defense | |
| Mar 7, 2026 | Klimkowski | ½–½ | Trushko | Budapest Spring Festival | Caro-Kann Defense: Classical Variation | |
| Mar 6, 2026 | Panesar Vedant | 1–0 | Klimkowski | Budapest Spring Festival | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Mar 5, 2026 | Seemann | 1–0 | Klimkowski | Budapest Spring Festival | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 3, 2026 | Klimkowski | 1–0 | Begmuratov | Budapest Spring Festival | Ruy Lopez: Open | |
| Mar 2, 2026 | Egresi | ½–½ | Klimkowski | Budapest Spring Festival | Italian Game: Paris Defense | |
| Mar 1, 2026 | Klimkowski | 1–0 | Wagh Suyog | Budapest Spring Festival | Nimzo-Indian Defense: Sämisch Variation | |
| Feb 28, 2026 | Papp | ½–½ | Klimkowski | Budapest Spring Festival | King's Indian Attack, with e6 | |
| Feb 27, 2026 | Klimkowski | 1–0 | Rudolf | Budapest Spring Festival | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Feb 22, 2026 | Ivanchuk | 1–0 | Klimkowski | Round 8: Ivanchuk, Vasyl - Klimkowski, Jan | Indian Defense: Anti-Nimzo-Indian | |
| Feb 21, 2026 | Klimkowski | ½–½ | Teclaf | Round 7: Klimkowski, Jan - Teclaf, Pawel | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Feb 20, 2026 | Klimkowski | 1–0 | Noy | Round 9: Klimkowski, Jan - Noy, Eyal | Nimzo-Indian Defense: Normal Variation | |
| Feb 19, 2026 | Klimkowski | 0–1 | Martins | Round 8: Klimkowski, Jan - Martins, Bruno Andre Leite | English Opening: King's English Variation | |
| Feb 18, 2026 | Vantika Agrawal | 0–1 | Klimkowski | Round 7: Vantika Agrawal - Klimkowski, Jan | Queen's Gambit Declined: Barmen Variation | |
| Feb 17, 2026 | Klimkowski | 1–0 | Piekielny | Round 6: Klimkowski, Jan - Piekielny, Pawel | English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense | |
| Feb 17, 2026 | Silva | ½–½ | Klimkowski | Round 5: Silva, Pedro Gil Ferreira Da - Klimkowski, Jan | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Feb 15, 2026 | Nakonechnyi | ½–½ | Klimkowski | Round 3: Nakonechnyi, Oleksii - Klimkowski, Jan | English Opening: King's English Variation, Two Knights Variation, Reversed Dragon | |
| Feb 15, 2026 | Klimkowski | ½–½ | Warchol | Round 2: Klimkowski, Jan - Warchol, Kamil | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Feb 14, 2026 | Mizzi | 0–1 | Klimkowski | Round 1: Mizzi, Jack - Klimkowski, Jan | Catalan Opening: Open Defense | |
| Feb 8, 2026 | Klimkowski | 0–1 | Caruana | Deutsche Schachbundesliga 2025/2026 | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Feb 7, 2026 | Livaic | 1–0 | Klimkowski | Deutsche Schachbundesliga 2025/2026 | Nimzo-Larsen Attack: Classical Variation | |
| Jan 11, 2026 | Klimkowski | 1–0 | Burg | Deutsche Schach-Bundesliga | English Opening: King's English Variation | |
| Jan 10, 2026 | Van Wely | ½–½ | Klimkowski | Deutsche Schach-Bundesliga | Catalan Opening: Open Defense | |
| Dec 22, 2025 | Klimkowski | ½–½ | Dardha | Budapest Spring Festival | Sicilian Defense: Classical Variation | |
| Dec 14, 2025 | Rodshtein | ½–½ | Klimkowski | Round 4: Rodshtein, Maxim - Klimkowski, Jan | Rubinstein Opening | |
| Dec 13, 2025 | Klimkowski | ½–½ | Haring | Round 3: Klimkowski, Jan - Haring, Filip | Scotch Game: Mieses Variation | |
| Dec 7, 2025 | Thybo | 1–0 | Klimkowski | Round 4: Thybo, Jesper Sondergaard - Klimkowski, Jan | Queen's Gambit Declined: Ragozin Defense | |
| Dec 6, 2025 | Klimkowski | ½–½ | Gustafsson | Round 3: Klimkowski, Jan - Gustafsson, Jan | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Nov 30, 2025 | Klimkowski | * | Harikrishna | Round 2: Klimkowski, Jan - Harikrishna, Pentala | ? | |
| Nov 29, 2025 | Cieslak | 1–0 | Klimkowski | Round 1: Cieslak, Patryk - Klimkowski, Jan | English Opening: King's English Variation, Four Knights Variation | |
| Nov 28, 2025 | Klimkowski | 0–1 | Van Foreest | Round 9 (1 match held early): Klimkowski, Jan - Van Foreest, Jorden | Caro-Kann Defense: Two Knights Attack | |
| Oct 15, 2025 | Stribuk | ½–½ | Klimkowski | Round 11: Stribuk, Artiom - Klimkowski, Jan | Catalan Opening: Closed | |
| Oct 14, 2025 | Klimkowski | 1–0 | Sukiasyan | Round 10: Klimkowski, Jan - Sukiasyan, Vahe A. | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 13, 2025 | Wafa | ½–½ | Klimkowski | Round 9: Wafa, Hamed - Klimkowski, Jan | Sicilian Defense: Najdorf Variation | |
| Oct 12, 2025 | Klimkowski | 0–1 | Sriram Adarsh Uppala | Round 8: Klimkowski, Jan - Sriram Adarsh Uppala | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 11, 2025 | Bai | 0–1 | Klimkowski | Round 7: Bai, Adelard - Klimkowski, Jan | English Opening: Agincourt Defense | |
| Oct 9, 2025 | Klimkowski | 1–0 | Khripachenko | Round 6: Klimkowski, Jan - Khripachenko, Alexander | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Oct 8, 2025 | Assylov | ½–½ | Klimkowski | Round 5: Assylov, Miras - Klimkowski, Jan | Bogo-Indian Defense: Vitolins Variation | |
| Oct 7, 2025 | Klimkowski | 1–0 | Sharon | Round 4: Klimkowski, Jan - Sharon, Rafael | Caro-Kann Defense: Maróczy Variation | |
| Oct 3, 2025 | Ilkhomi | 1–0 | Klimkowski | Round 1: Ilkhomi, Jaloliddin - Klimkowski, Jan | Catalan Opening: Open Defense | |
| Sep 28, 2025 | Klimkowski | ½–½ | Ponomariov | Round 2: Klimkowski, Jan - Ponomariov, Ruslan | Nimzo-Indian Defense: Sämisch Variation | |
| Sep 27, 2025 | Van Foreest | ½–½ | Klimkowski | Round 1: Van Foreest, Jorden - Klimkowski, Jan | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Jul 20, 2025 | Glek | ½–½ | Klimkowski | CN Equipas 2024-25 | Sicilian Defense: French Variation | |
| Jul 19, 2025 | Klimkowski | ½–½ | Kazakouski | CN Equipas 2024-25 | Scotch Game: Potter Variation | |
| Jul 18, 2025 | Volokitin | ½–½ | Klimkowski | CN Equipas 2024-25 | Sicilian Defense: Four Knights Variation | |
| Jul 18, 2025 | Klimkowski | 1–0 | Zlatkov | CN Equipas 2024-25 | Sicilian Defense: Alapin Variation | |
| Jul 17, 2025 | Fier | ½–½ | Klimkowski | CN Equipas 2024-25 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jul 16, 2025 | Klimkowski | 1–0 | Dobosiewicz | Macieja Memorial | Nimzo-Indian Defense: Rubinstein System | |
| Jul 16, 2025 | Borischik | 0–1 | Klimkowski | Macieja Memorial | King's Indian Attack: Keres Variation | |
| Jul 16, 2025 | Klimkowski | ½–½ | Spraggett | CN Equipas 2024-25 | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 15, 2025 | Sousa | ½–½ | Klimkowski | CN Equipas 2024-25 | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jul 15, 2025 | Klimkowski | ½–½ | Peralta | CN Equipas 2024-25 | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jul 14, 2025 | Taboas Rodriguez | 0–1 | Klimkowski | CN Equipas 2024-25 | Queen's Gambit Declined: Barmen Variation | |
| Jul 7, 2025 | Golis | ½–½ | Klimkowski | Macieja Memorial | Zukertort Opening | |
| Jul 7, 2025 | Klimkowski | 1–0 | Kazakouski | Macieja Memorial | Slav Defense: Quiet Variation, Schallopp Defense | |
| Jul 7, 2025 | Krzyzanowski | 0–1 | Klimkowski | Macieja Memorial | Rapport-Jobava System | |
| Jul 7, 2025 | Klimkowski | 1–0 | Tomczak | Macieja Memorial | Grünfeld Defense: Exchange Variation | |
| Jul 7, 2025 | Leniart | 0–1 | Klimkowski | Macieja Memorial | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Jul 7, 2025 | Klimkowski | 1–0 | Gdanski | Macieja Memorial | Benoni Defense | |
| Jul 7, 2025 | Baum | 1–0 | Klimkowski | Macieja Memorial | Dutch Defense: Semi-Leningrad Variation | |
| Jul 7, 2025 | Klimkowski | 1–0 | Karolczuk | Macieja Memorial | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line | |
| Jul 6, 2025 | Klimkowski | 1–0 | Nie | Macieja Memorial | Queen's Gambit Declined: Janowski Variation | |
| Jun 15, 2025 | Klimkowski | 0–1 | Svane | 2025 FIDE World Blitz Team Championschip Knockout matches 5-8 | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |