| 31 ago 2026 | Gbiorczyk, Mikolaj 2138 | Butkiewicz, Jan 2239 | 1-0 | C01 French Defense: Exchange Variation | II Liga 2026 | 32 | Ver |
| 30 ago 2026 | Butkiewicz, Jan 2239 | Muc, Marcin 2150 | 1-0 | C45 Scotch Game | II Liga 2026 | 25 | Ver |
| 29 ago 2026 | Bugajski, Robert 2006 | Butkiewicz, Jan 2239 | 0-1 | A05 King's Indian Attack: Spassky Variation | II Liga 2026 | 51 | Ver |
| 5 ago 2026 | Butkiewicz, Jan 2239 | Hury, Tymoteusz 2169 | 1-0 | E94 King's Indian Defense: Orthodox Variation, Positional Defense | anderssenA | 52 | Ver |
| 4 ago 2026 | Gorka, Tymoteusz 2010 | Butkiewicz, Jan 2239 | 0-1 | C15 French Defense: Winawer Variation, Delayed Exchange Variation | anderssenA | 78 | Ver |
| 3 ago 2026 | Butkiewicz, Jan 2239 | Owczarek, Hanna 2025 | 1-0 | B13 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | anderssenA | 47 | Ver |
| 2 ago 2026 | Lambrecht, Tomasz 2071 | Butkiewicz, Jan 2239 | ½-½ | D55 Queen's Gambit Declined: Anti-Tartakower Variation | anderssenA | 50 | Ver |
| 1 ago 2026 | Butkiewicz, Jan 2239 | Achynovych, Oleh 2148 | 1-0 | D02 Queen's Pawn Game: Symmetrical Variation | Adolf Anderssen Chess Festival 2026 - OPEN A | 44 | Ver |
| 1 ago 2026 | Butkiewicz, Jan 2239 | Ostojski, Dawid 2111 | 1-0 | E10 Blumenfeld Countergambit: Spielmann Variation | Adolf Anderssen Chess Festival 2026 - OPEN A | 43 | Ver |
| 1 ago 2026 | Sabuk, Piotr 2323 | Butkiewicz, Jan 2239 | 0-1 | E11 Bogo-Indian Defense: Retreat Variation | Adolf Anderssen Chess Festival 2026 - OPEN A | 35 | Ver |
| 1 ago 2026 | Butkiewicz, Jan 2239 | Dobrowolski, Aleksander 2131 | 1-0 | D37 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense | anderssenA | 60 | Ver |
| 1 ago 2026 | Gbiorczyk, Mikolaj 2138 | Butkiewicz, Jan 2239 | 0-1 | C02 French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | anderssenA | 32 | Ver |
| 13 jul 2026 | Butkiewicz, Jan 2129 | Obrycki, Tomasz 2099 | 0-1 | E16 Queen's Indian Defense: Capablanca Variation | Blitz C16 | 122 | Ver |
| 13 jul 2026 | Rosol, Philip 2194 | Butkiewicz, Jan 2129 | ½-½ | D31 Queen's Gambit Declined: Charousek Variation | Blitz C16 | 39 | Ver |
| 13 jul 2026 | Brzezina, Piotr 2203 | Butkiewicz, Jan 2129 | 1-0 | D35 Queen's Gambit Declined: Exchange Variation, Positional Variation | Blitz C16 | 34 | Ver |
| 13 jul 2026 | Moczulski, Michal 2004 | Butkiewicz, Jan 2129 | 0-1 | B22 Sicilian Defense: Alapin Variation, Smith-Morra Declined | Blitz C16 | 53 | Ver |
| 13 jul 2026 | Kraczek, Cezary 2111 | Butkiewicz, Jan 2129 | ½-½ | D01 Rapport-Jobava System | Blitz C16 | 69 | Ver |
| 12 jul 2026 | Brzezina, Piotr 2273 | Butkiewicz, Jan 2197 | ½-½ | E08 Catalan Opening: Closed | Rapid C16 | 10 | Ver |
| 12 jul 2026 | Butkiewicz, Jan 2197 | Majcher, Igor 2181 | 1-0 | A41 Queen's Pawn Game: Rossolimo Variation | Rapid C16 | 22 | Ver |
| 12 jul 2026 | Butkiewicz, Jan 2197 | Niezhentsev, Kyrylo 2255 | ½-½ | D93 Grünfeld Defense: Three Knights Variation, Hungarian Variation | Rapid C16 | 71 | Ver |