| Jun 30, 2026 | Sieczkowski | ½–½ | Khamidov | Najdorf Memorial | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Jun 29, 2026 | Sieczkowski | 1–0 | Pancewicz | Najdorf Memorial | Queen's Pawn Game: Zukertort Variation | |
| Jun 28, 2026 | Debmisra | 0–1 | Sieczkowski | Najdorf Memorial | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jun 27, 2026 | Sieczkowski | 0–1 | Filev | Macieja Memorial | Sicilian Defense: Dragon Variation, Classical Variation, Normal Line | |
| Jun 27, 2026 | Sieczkowski | 0–1 | Krzyzanowski | Macieja Memorial | ? | |
| Jun 27, 2026 | Korszanski | 1–0 | Sieczkowski | Najdorf Memorial | Caro-Kann Defense: Panov Attack | |
| Feb 1, 2026 | Hill | 1–0 | Sieczkowski | Round 4: Hill, Andy - Sieczkowski, Adam | Rubinstein Opening | |
| Jan 31, 2026 | Sieczkowski | 0–1 | Fernandez | Round 3: Sieczkowski, Adam - Fernandez, Michael | Slav Defense: Quiet Variation | |
| Jan 31, 2026 | Sieczkowski | 1–0 | Hobson | Round 2: Sieczkowski, Adam - Hobson, Kenneth | Bogo-Indian Defense: Retreat Variation | |
| Oct 31, 2025 | Sieczkowski | 1–0 | Hariharan | ECF Coventry International 2025 | Nimzo-Indian Defense: Rubinstein System | |
| Oct 30, 2025 | Dissanayake | 0–1 | Sieczkowski | ECF Coventry International 2025 | French Defense: Tarrasch Variation, Closed Variation | |
| Oct 30, 2025 | Sieczkowski | 0–1 | Okhai | ECF Coventry International 2025 | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Oct 29, 2025 | Lishoy Gengis Paratazham | ½–½ | Sieczkowski | ECF Coventry International 2025 | Caro-Kann Defense: Panov Attack, Main Line | |
| Oct 28, 2025 | Harikrishnan.A.Ra | 1–0 | Sieczkowski | Round 9: Harikrishnan.A.Ra - Sieczkowski, Adam | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Oct 28, 2025 | Sieczkowski | 1–0 | Ward | Round 8: Sieczkowski, Adam - Ward, Cian | French Defense: Advance Variation, Milner-Barry Gambit | |
| Oct 28, 2025 | Emjam | 0–1 | Sieczkowski | Round 7: Emjam, Harsha Vardhan - Sieczkowski, Adam | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Oct 28, 2025 | Sieczkowski | 0–1 | Sasikumar | Round 6: Sieczkowski, Adam - Sasikumar, Srivathsan | Semi-Slav Defense: Stoltz Variation | |
| Oct 28, 2025 | Whitmore | 0–1 | Sieczkowski | Round 5: Whitmore, Darren H - Sieczkowski, Adam | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Oct 28, 2025 | Sieczkowski | 0–1 | Rami | Round 4: Sieczkowski, Adam - Rami,Talab | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Oct 28, 2025 | Dissanayake | 0–1 | Sieczkowski | Round 3: Dissanayake, Sathsara - Sieczkowski, Adam | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Oct 28, 2025 | Minhas | 0–1 | Sieczkowski | 2025 Coventry International - Blitz | King's Indian Attack: Wahls Defense | |
| Oct 28, 2025 | Sieczkowski | 0–1 | Pal | ECF Coventry International 2025 | Queen's Gambit Declined: Three Knights Variation | |
| Oct 27, 2025 | Kanyamarala | 1–0 | Sieczkowski | ECF Coventry International 2025 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 27, 2025 | Sieczkowski | 1–0 | Fellowes | ECF Coventry International 2025 | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Oct 27, 2025 | Sieczkowski | 0–1 | Plat | Round 2: Sieczkowski, Adam - Plat, Vojtech | Wade Defense | |
| Oct 26, 2025 | Dhingra | 0–1 | Sieczkowski | ECF Coventry International 2025 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 26, 2025 | Sieczkowski | 0–1 | Vijayakumar | ECF Coventry International 2025 | Queen's Gambit Declined: Ragozin Defense | |
| — | Sieczkowski | 1–0 | Sugden | Round 2: Sieczkowski, Adam - Sugden, John N | Caro-Kann Defense: Advance Variation | |
| — | Sieczkowski | 1–0 | Bhatia | Round 4: Sieczkowski, Adam - Bhatia, Kanishka | Ruy Lopez: Closed, Bogoljubow Variation | |
| — | Sieczkowski | 1–0 | Nasiri | Round 6: Sieczkowski, Adam - Nasiri, Fahim | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| — | Sieczkowski | 0–1 | Pilley | Round 7: Sieczkowski, Adam - Pilley, Jack | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | |
| — | Sieczkowski | ½–½ | Hill | Round 1: Sieczkowski, Adam - Hill, Andy | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| — | Sieczkowski | ½–½ | Sachdeva | Round 3: Sieczkowski, Adam - Sachdeva, Ronit | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| — | Sieczkowski | 1–0 | Coffey | Round 5: Sieczkowski, Adam - Coffey, Anthony | Tarrasch Defense: Classical Variation | |
| — | Vashisht-Pigem | ½–½ | Sieczkowski | Round 1: Vashisht-Pigem, Raman - Sieczkowski, Adam | Sicilian Defense: O'Kelly Variation, Maróczy Bind | |
| — | Xian | 0–1 | Sieczkowski | Round 3: Xian, Junhao - Sieczkowski, Adam | Grünfeld Defense: Exchange Variation | |
| — | Rushbrooke | 1–0 | Sieczkowski | Round 5: Rushbrooke, Remy - Sieczkowski, Adam | King's Indian Attack: Sicilian Variation | |
| — | Izod | 0–1 | Sieczkowski | Round 8: Izod, Chris - Sieczkowski, Adam | East Indian Defense | |
| — | Lee | 1–0 | Sieczkowski | Round 9: Lee, Alexandre KM - Sieczkowski, Adam | Sicilian Defense: Hyperaccelerated Fianchetto | |
| — | Terler | 0–1 | Sieczkowski | Round 2: Terler, Bohdan - Sieczkowski, Adam | Four Knights Game: Scotch Variation Accepted | |
| — | Hayward | 1–0 | Sieczkowski | Round 4: Hayward, Philip - Sieczkowski, Adam | English Opening: King's English Variation, Taimanov Variation | |
| — | Jones | 0–1 | Sieczkowski | Round 6: Jones, Mark A - Sieczkowski, Adam | Sicilian Defense: O'Kelly Variation, Maróczy Bind | |