64 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kosak, Karolina | Sedlak, Frantisek | 0-1 | B01 | Round 2: Kosak, Karolina - Sedlak, Frantisek | 2025-11-23 |
| Kosak, Karolina | Treifi, Hani | 1-0 | B13 | Round 4: Kosak, Karolina - Treifi, Hani | 2025-11-23 |
| Kosak, Karolina | Tsopanopoulos, Michael | 1-0 | C00 | Round 6: Kosak, Karolina - Tsopanopoulos, Michael | 2025-11-23 |
| Kosak, Karolina | Malmstroem, Eva | 1-0 | C56 | Round 8: Kosak, Karolina - Malmstroem, Eva | 2025-11-23 |
| Kosak, Karolina | Doedens, Julian | 0-1 | B22 | Round 9: Kosak, Karolina - Doedens, Julian | 2025-11-23 |
| Kosak, Karolina | Boissel, Kasimir | 0-1 | C00 | Round 2: Kosak, Karolina - Boissel, Kasimir | 2025-11-22 |
| Kosak, Karolina | Rottstock, Henrike Georgina | 1-0 | B13 | Round 4: Kosak, Karolina - Rottstock, Henrike Georgina | 2025-11-22 |
| Kosak, Karolina | Riecken, Henning | 1-0 | C56 | Round 6: Kosak, Karolina - Riecken, Henning | 2025-11-22 |
| Kosak, Karolina | Stoehr, Leif | 0-1 | B13 | Round 8: Kosak, Karolina - Stoehr, Leif | 2025-11-22 |
| Kosak, Karolina | Sautner, Wilhelm | 1-0 | B10 | Round 2: Kosak, Karolina - Sautner, Wilhelm | 2024-10-12 |
| Kosak, Karolina | Deak-Sala, Emilia | 0-1 | B22 | EYCC 2024 - G18 | 2024-08-22 |
| Kosak, Karolina | Deak-Sala, Emilia | 0-1 | B22 | Girls18 | 2024-08-20 |
| Kosak, Karolina | Shuqja, Klean | 0-1 | B13 | Girls18 | 2024-08-19 |
| Kosak, Karolina | Jovanovic, Anja | 0-1 | B22 | Girls18 | 2024-08-18 |
| Kosak, Karolina | Sevcikova, Lucia | 0-1 | B13 | Girls18 | 2024-08-17 |
| Kosak, Karolina | Radej, Pika | 0-1 | B22 | Girls18 | 2024-08-17 |
| Kosak, Karolina | Berezovsky, Fiorina | 0-1 | C02 | 22nd European Youth Blitz Championship 2023 - G-16 | 2023-09-30 |
| Karolina Kosak | Isafara Gergin | 1-0 | B22 | FIDE U16 Olympiad_boards_1-80 | 2023-08-17 |
| Karolina Kosak | Aidana Madi | 1/2-1/2 | B22 | FIDE U16 Olympiad_boards_1-80 | 2023-08-16 |
| Karolina Kosak | Aikaterini Argyro Gkoutzouki | 0-1 | B22 | FIDE U16 Olympiad_boards_1-80 | 2023-08-15 |
| Karolina Kosak | Emilia Deak-Sala | 1/2-1/2 | B22 | FIDE U16 Olympiad_boards_1-80 | 2023-08-14 |
| Karolina Kosak | Bernice Wambui Gikandi | 1-0 | B22 | FIDE U16 Olympiad_boards_81-124 | 2023-08-13 |
| Kosak, Karolina | Gvatua, Mariam | 0-1 | C25 | G16 | FIDE World Blitz Championship | 2023-06-11 |
| Kosak, Karolina | Seemann, Pola | 0-1 | B13 | G16 | FIDE World Blitz Championship | 2023-06-11 |
| Kosak, Karolina | Dorashava, Viktoryia | 1/2-1/2 | B22 | girls-16 | 2023-06-10 |
| Kosak, Karolina | Bakhtiyarova, Shakhzoda | 1-0 | C02 | girls-16 | 2023-06-10 |
| Kosak, Karolina | Amulya, Guruprasad | 0-1 | B22 | girls-16 | 2023-06-08 |
| Kosak, Karolina | Hayrapetyan, Nvard | 1/2-1/2 | B22 | girls-16 | 2023-06-07 |
| Kosak, Karolina | Nkhwashu, Geraldine | 1-0 | B13 | girls-16 | 2023-06-07 |
| Kosak, Karolina | Krömer, Paulina | 0-1 | B22 | DEM U18w 2022 | 2022-06-11 |
| Kosak, Karolina | Albayrak, Nese Pinar | 1/2-1/2 | C47 | DEM U18w 2022 | 2022-06-09 |
| Kosak, Karolina | Müller, Sophie Charlotte | 1/2-1/2 | C41 | DEM U18w 2022 | 2022-06-08 |
| Kosak, Karolina | Jacoby, Angelina | 1/2-1/2 | B01 | DEM U18w 2022 | 2022-06-07 |
| Kosak, Karolina | Orlova, Alicia | * | B01 | DEM U18w 2022 | 2022-06-05 |