18 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kostov, Kiril | Dolek, Gokalp Deniz | 1/2-1/2 | D15 | Round 5: Kostov, Kiril - Dolek, Gokalp Deniz | 2025-07-31 |
| Kostov, Kiril | Pastras, Ioannis | 1-0 | C88 | Round 1: Kostov, Kiril - Pastras, Ioannis | 2025-07-28 |
| Kostov, Kiril | Bai, Xuhui | 1/2-1/2 | B40 | Round 3: Kostov, Kiril - Bai, Xuhui | 2025-07-16 |
| Kostov, Kiril | Kostov, Deyan Samuil | 0-1 | B40 | 13. SPLIT OPEN: Å AHOVSKI FESTIVAL 2024 | 2024-08-04 |
| Kostov, Kiril | Morgunov, Marc | 0-1 | B69 | 12. Split Open 05.-13.08.2023. | 2023-08-06 |
| Kiril Kostov | Jasper Holtel | 0-1 | B32 | Round 6: Kiril Kostov - Jasper Holtel | 2023-02-15 |
| Kiril Kostov | M.R. Venkatesh | 1-0 | A14 | Round 2: Kiril Kostov - M.R. Venkatesh | 2023-02-12 |
| Kostov, Kiril | Aral, Demir | 1-0 | B15 | Round 7: Kostov, Kiril - Aral, Demir | |
| Kostov, Kiril | Sahin, Tuna | 1/2-1/2 | B23 | Round 9: Kostov, Kiril - Sahin, Tuna |