| Jul 13, 2026 | Ejsymont | 1–0 | Sieniawski | Blitz C12 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Hungarian Dragon | |
| Jul 13, 2026 | Sieniawski | 1–0 | Lobacz | Blitz C12 | Sicilian Defense: Closed | |
| Jul 13, 2026 | Sieniawski | 0–1 | Cieslar | Blitz C12 | Italian Game: Two Knights Defense | |
| Jul 13, 2026 | Folta | 0–1 | Sieniawski | Blitz C12 | English Opening: Symmetrical Variation | |
| Jul 12, 2026 | Wolynski | 0–1 | Sieniawski | Rapid C12 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Hungarian Dragon | |
| Jul 12, 2026 | Sieniawski | ½–½ | Trautsolt-Jeziorski | Rapid C12 | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Jul 12, 2026 | Sieniawski | ½–½ | Buklaho | Rapid C12 | Sicilian Defense: Closed, Korchnoi Defense | |
| Jul 12, 2026 | Zadora | 0–1 | Sieniawski | Rapid C12 | Benko Gambit Accepted: Fully Accepted Variation | |
| Jul 11, 2026 | Panasiuk | 1–0 | Sieniawski | Rapid C12 | Sicilian Defense: Prins Variation | |
| Jul 9, 2026 | Sieniawski | * | Ilko-Toth | rzeszow | ? | |
| Jul 9, 2026 | Ilko-Toth | * | Sieniawski | rzeszow | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| May 29, 2026 | Burkot | 0–1 | Sieniawski | II DMP Juniorow 2026 | Sicilian Defense: Dragon Variation | |
| May 28, 2026 | Sieniawski | 0–1 | Nieroda | II DMP Juniorow 2026 | Scandinavian Defense: Modern Variation | |
| May 27, 2026 | Mikolajczyk | 1–0 | Sieniawski | II DMP Juniorow 2026 | Sicilian Defense: Four Knights Variation | |
| May 26, 2026 | Sieniawski | 1–0 | Karas | II DMP Juniorow 2026 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| May 25, 2026 | Tanski | 0–1 | Sieniawski | II DMP Juniorow 2026 | Sicilian Defense: Dragon Variation | |
| May 24, 2026 | Sieniawski | ½–½ | Lewinski | II DMP Juniorow 2026 | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| May 23, 2026 | Morozov | 1–0 | Sieniawski | II DMP Juniorow 2026 | Sicilian Defense: McDonnell Attack | |
| May 22, 2026 | Sieniawski | 1–0 | Zaglowek | II DMP Juniorow 2026 | Sicilian Defense: Closed | |
| May 21, 2026 | Osinski | ½–½ | Sieniawski | II DMP Juniorow 2026 | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Jun 21, 2025 | Sieniawski | 0–1 | Kulczycki | DMPJ 1 liga 2025 | Sicilian Defense: O'Kelly Variation, Normal System | |
| Jun 19, 2025 | Zajadlak | 0–1 | Sieniawski | DMPJ 1 liga 2025 | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| Jun 18, 2025 | Sieniawski | 1–0 | Rainer | DMPJ 1 liga 2025 | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| Jun 17, 2025 | Sieniawski | 0–1 | Goralski | DMPJ 1 liga 2025 | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jun 16, 2025 | Sieniawski | ½–½ | Furas | DMPJ 1 liga 2025 | French Defense: Winawer Variation, Delayed Exchange Variation | |
| Sep 15, 2024 | Sieniawski | 0–1 | Oliwkiewicz | Eliminacje_Strefowe_OP_SL_2024_C11 | Caro-Kann Defense: Classical Variation | |
| Sep 14, 2024 | Lewinski | 0–1 | Sieniawski | Eliminacje_Strefowe_OP_SL_2024_C11 | Sicilian Defense: Closed | |
| Sep 13, 2024 | Sieniawski | 1–0 | Ekiert | Eliminacje_Strefowe_OP_SL_2024_C11 | Italian Game: Two Knights Defense | |
| Sep 12, 2024 | Sieniawski | 0–1 | Niemczyk | Eliminacje_Strefowe_OP_SL_2024_C11 | Italian Game: Giuoco Piano | |
| Sep 12, 2024 | Pustul | 1–0 | Sieniawski | Eliminacje_Strefowe_OP_SL_2024_C11 | Sicilian Defense: Old Sicilian | |
| Sep 11, 2024 | Wieczorek | 0–1 | Sieniawski | Eliminacje_Strefowe_OP_SL_2024_C11 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 10, 2024 | Sieniawski | 1–0 | Swiderski | Eliminacje_Strefowe_OP_SL_2024_C11 | Sicilian Defense: O'Kelly Variation, Normal System, Taimanov Line | |
| Sep 10, 2024 | Feseniuk | 1–0 | Sieniawski | Eliminacje_Strefowe_OP_SL_2024_C11 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 9, 2024 | Sieniawski | 0–1 | Cichocki | Eliminacje_Strefowe_OP_SL_2024_C11 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Aug 3, 2024 | Szczukiewicz | 1–0 | Sieniawski | Mistrzostwa Polski C10 Rapid | Sicilian Defense: Closed | |
| Aug 2, 2024 | Sieniawski | 1–0 | Slotala | Mistrzostwa Polski C10 Rapid | Italian Game: Deutz Gambit | |
| Aug 2, 2024 | Sieniawski | 0–1 | Wnorowski | Mistrzostwa Polski C10 Rapid | Scandinavian Defense: Classical Variation | |
| Aug 2, 2024 | Solarz | 0–1 | Sieniawski | Mistrzostwa Polski C10 Rapid | Sicilian Defense: Old Sicilian | |
| Aug 2, 2024 | Hurskyi | 1–0 | Sieniawski | Mistrzostwa Polski C10 Rapid | Sicilian Defense: Godiva Variation | |