4 games · 2018–2025 · 4 classical · 0 online
Koykka 21 draws1 Sammalvuo
62.5% for Koykka
Openings between them
| A14 | English Opening: Agincourt Defense, Neo-Catalan Declined | 1 | 50.0% |
| A30 | English Opening: Symmetrical Variation, Hedgehog Defense | 1 | 100.0% |
| A88 | Dutch Defense: Leningrad Variation, Warsaw Variation | 1 | 100.0% |
| A89 | Dutch Defense: Leningrad Variation, Matulovic Variation | 1 | 0.0% |
All games
| Sammalvuo, T2380 | 1-0 | Koykka, P2340 | TCh-FIN 2025-26 | 2025 |
| Koykka, P2353 | ½-½ | Sammalvuo, T2416 | TCh-FIN 2022-23 | 2022 |
| Koykka, P2389 | 1-0 | Sammalvuo, T2416 | TCh-FIN 2018-19 | 2019 |
| Sammalvuo, T2435 | 0-1 | Koykka, P2345 | ch-FIN 2018 | 2018 |