27 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kosta, Kelvin | Kazantzoglou, Stefanos | 0-1 | C26 | Round 6: Kosta, Kelvin - Kazantzoglou, Stefanos | 2025-03-02 |
| Kosta, Kelvin | Paasikangas, Johanna | 1/2-1/2 | B31 | 39th European Chess Club Cup | 2024-10-24 |
| Kosta, Kelvin | Gulbas, Cemil | 0-1 | B07 | 39th European Chess Club Cup | 2024-10-22 |
| Kosta, Kelvin | Sos Andreu, Eric | 1/2-1/2 | B10 | 39th European Chess Club Cup | 2024-10-20 |
| Kelvin Kosta | Vladimir Savitskiy | 0-1 | B96 | FIDE U16 Olympiad_boards_81-124 | 2023-08-17 |
| Kelvin Kosta | Hong-Yi Lai | 1/2-1/2 | C02 | FIDE U16 Olympiad_boards_81-124 | 2023-08-17 |
| Kelvin Kosta | Roger Labruyere | 0-1 | B17 | FIDE U16 Olympiad_boards_1-80 | 2023-08-15 |
| Kelvin Kosta | Magnus Ermitsch | 1-0 | B49 | FIDE U16 Olympiad_boards_1-80 | 2023-08-14 |
| Kelvin Kosta | Davida Strong | 1-0 | C02 | FIDE U16 Olympiad_boards_81-124 | 2023-08-13 |
| Kosta, Kelvin | Prata, Luis | 1-0 | B19 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Kosta, Kelvin | Ramaj, Ergit | 1-0 | B01 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Kosta, Kelvin | Masilo, Ofile | 0-1 | B52 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Kosta, Kelvin | Willder, Matthew | 1-0 | C47 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Kosta, Kelvin | De Carvalho, Vitor Augusto Ponciano | 0-1 | B23 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |