| 23 ago 2026 | Wieczorek, Zbigniew 2140 | Bartczak, Korneliusz 2062 | 1-0 | A08 Apertura Zukertort: Reversed Grünfeld | Polanica2026-openA | 42 | Ver |
| 22 ago 2026 | Bartczak, Korneliusz 2062 | Madej, Marek 2255 | ½-½ | B44 Defensa Siciliana: Taimanov Variation | 62. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN A | 20 | Ver |
| 21 ago 2026 | Rzadkowska, Kaja 2007 | Bartczak, Korneliusz 2062 | 0-1 | B30 Defensa Siciliana: Nyezhmetdinov-Rossolimo Attack | Polanica2026-openA | 64 | Ver |
| 20 ago 2026 | Baginskaite, Kamile 2141 | Bartczak, Korneliusz 2062 | 1-0 | A11 Apertura Réti: Anglo-Slav Variation, with g3 | Polanica2026-openA | 50 | Ver |
| 19 ago 2026 | Bartczak, Korneliusz 2062 | Golubka, Petro 2354 | ½-½ | C55 Apertura Italiana: Two Knights Defense, Modern Bishop's Opening | 62. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN A | 44 | Ver |
| 18 ago 2026 | Bartczak, Korneliusz 2062 | Kryston, Aleksander 2130 | ½-½ | D79 Defensa Neogrünfeld: Ultra-Delayed Exchange Variation | Polanica2026-openA | 13 | Ver |
| 17 ago 2026 | Dubinski, Mateusz 2183 | Bartczak, Korneliusz 2062 | 0-1 | E47 Defensa Nimzoindia: Normal Variation | Polanica2026-openA | 36 | Ver |
| 16 ago 2026 | Stepinski, Piotr 2174 | Bartczak, Korneliusz 2062 | 1-0 | C65 Apertura Española (Ruy López): Berlin Defense, Nyholm Attack | 62. Miedzynarodowy Festiwal Szachowy im. Akiby Rubinsteina - OPEN A | 58 | Ver |
| 15 ago 2026 | Bartczak, Korneliusz 2062 | Karasek, Lukas 2200 | ½-½ | B84 Defensa Siciliana: Scheveningen Variation, Classical Variation | Polanica2026-openA | 41 | Ver |
| 9 ago 2026 | Woods, Yannick 2118 | Bartczak, Korneliusz 2062 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Short Variation | The 105th Irish Championship 2026 | Championship | 34 | Ver |
| 8 ago 2026 | Bartczak, Korneliusz 2062 | Venkatesan, Kavin 2297 | ½-½ | E14 Queen's Indian Defense, with e3 | The 105th Irish Championship 2026 | Championship | 41 | Ver |
| 7 ago 2026 | Hushpit, Lukian 2088 | Bartczak, Korneliusz 2062 | 0-1 | B32 Defensa Siciliana: Kalashnikov Variation | The 105th Irish Championship 2026 | Championship | 126 | Ver |
| 6 ago 2026 | Bartczak, Korneliusz 2062 | Paibir, Atharva 2067 | ½-½ | B40 Defensa Siciliana: Delayed Alapin Variation, with e6 | The 105th Irish Championship 2026 | Championship | 23 | Ver |
| 5 ago 2026 | Liu, Jason 2161 | Bartczak, Korneliusz 2062 | ½-½ | B32 Defensa Siciliana: Kalashnikov Variation | The 105th Irish Championship 2026 | Championship | 42 | Ver |
| 21 jun 2026 | Bartczak, Korneliusz 2130 | Kostic, Milutin B 2064 | ½-½ | B17 Defensa Caro-Kann: Karpov Variation, Modern Main Line | 38th International Chess Tournament Open Pula 2026 | 33 | Ver |
| 31 may 2026 | Liu, Jason 2252 | Bartczak, Korneliusz 2130 | ½-½ | C50 Apertura Italiana: Giuoco Pianissimo, Italian Four Knights Variation | 35th Drogheda Chess Congress | Thomson Masters | 15 | Ver |
| 31 may 2026 | Bartczak, Korneliusz 2130 | Cole, Ethan 2044 | ½-½ | B22 Defensa Siciliana: Alapin Variation | 35th Drogheda Chess Congress | Thomson Masters | 37 | Ver |
| 26 abr 2026 | Bartczak, Korneliusz 2106 | Gubanov, Oleg 2254 | ½-½ | B92 Defensa Siciliana: Najdorf Variation, Opocensky Variation | Irish National Club Championship 2026 | 24 | Ver |
| 26 abr 2026 | Arun, Nitish 2227 | Bartczak, Korneliusz 2106 | 1-0 | E32 Defensa Nimzoindia: Classical Variation | Irish National Club Championship 2026 | 42 | Ver |
| 24 abr 2026 | Venkatesan, Kavin 2300 | Bartczak, Korneliusz 2106 | ½-½ | E46 Defensa Nimzoindia: Reshevsky Variation | Irish National Club Championship 2026 | 23 | Ver |