12 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Lassi Kokkonen | Patrik Aalto | 1-0 | A85 | Round 5: Lassi Kokkonen - Patrik Aalto | 2023-06-10 |
| Lassi Kokkonen | Toni Vainikka | 0-1 | D20 | Round 6: Lassi Kokkonen - Toni Vainikka | 2023-06-10 |
| Lassi Kokkonen | Anton Impivaara | 1-0 | D55 | Round 3: Lassi Kokkonen - Anton Impivaara | 2023-06-09 |
| Lassi Kokkonen | Adam Karhula | 1/2-1/2 | A52 | Round 1: Lassi Kokkonen - Adam Karhula | 2023-06-08 |
| Lassi Kokkonen | Ask Amundsen | 1-0 | B48 | Nordic Youth Championship 2023 | 2023-02-19 |
| Lassi Kokkonen | Erik Dingertz | 0-1 | C29 | Nordic Youth Championship 2023 | 2023-02-18 |
| Lassi Kokkonen | Konsta Kallunki | 0-1 | C24 | Nordic Youth Championship 2023 | 2023-02-17 |