| Game | Result | Opening | Date |
|---|---|---|---|
| Kostak, Tetyana (2014) – Eberle, Triona (2058) | 0-1 | Sicilian Defense: Delayed Alapin Variation, with d6 | 2026-07-25 |
| Kosovska, Olena (1927) – Kostak, Tetyana (2014) | 0-1 | Pirc Defense | 2026-07-24 |
| Kostak, Tetyana (2014) – Khuong, Thi Hong Nhung (1943) | 1-0 | Sicilian Defense: O'Kelly Variation, Quiet System | 2026-07-23 |
| Kostak, Tetyana (2014) – von Beckh, Frieda (1878) | 0-1 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | 2026-07-22 |
| Bluebaum, Johanna (1923) – Kostak, Tetyana (2014) | 1/2-1/2 | Old Indian Defense: Czech Variation, with Nf3 | 2026-07-22 |
| Schirmbeck, Lilian (1979) – Kostak, Tetyana (2014) | 1-0 | Queen's Pawn Game | 2026-07-21 |
| Bardorz, Jana (2083) – Kostak, Tetyana (2014) | 1/2-1/2 | Pirc Defense | 2026-07-20 |
| Kostak, Tetyana (2014) – Voigt, Anastasia (2042) | 1/2-1/2 | Rubinstein Opening: Classical Defense | 2026-07-20 |
| Kostak, Tetyana (2014) – Lobe, Sandra, Dr. (1862) | 1-0 | Ponziani Opening: Jaenisch Counterattack | 2026-07-19 |
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