6 games · 2019–2026 · 6 classical · 0 online
Koykka 40 draws2 Lahdelma
66.7% for Koykka
Openings between them
| A28 | English Opening: Four Knights System, Nimzowitsch Variation | 1 | 100.0% |
| A37 | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | 1 | 0.0% |
| A57 | Benko Gambit Accepted: Dlugy Variation | 1 | 0.0% |
| C11 | French Defense: Steinitz Variation, Boleslavsky Variation | 1 | 100.0% |
| E32 | Nimzo-Indian Defense: Classical Variation | 1 | 100.0% |
| E47 | Nimzo-Indian Defense: Normal Variation | 1 | 100.0% |
All games
| Lahdelma, Henri2319 | 1-0 | Koykka, P2325 | ch-FIN 2026 | 2026 |
| Koykka, P2351 | 1-0 | Lahdelma, Henri2297 | ch-FIN 2025 | 2025 |
| Koykka, P2350 | 1-0 | Lahdelma, Henri2344 | ch-FIN 2024 | 2024 |
| Lahdelma, Henri2328 | 0-1 | Koykka, P2332 | 31st Heart of Finland Op | 2023 |
| Lahdelma, Henri2315 | 0-1 | Koykka, P2329 | ch-FIN 2023 | 2023 |
| Lahdelma, Henri2188 | 1-0 | Koykka, P2399 | ch-FIN 2019 | 2019 |