3 games · 2013–2024 · 3 classical · 0 online
Mertanen 12 draws0 Koskinen
66.7% for Mertanen
Openings between them
| A06 | Zukertort Opening | 1 | 50.0% |
| A13 | English Opening: Agincourt Defense | 1 | 50.0% |
| D11 | Slav Defense: Modern Line | 1 | 100.0% |
All games
| Mertanen, J2279 | ½-½ | Koskinen, Hen2117 | TCh-FIN 2024-25 | 2024 |
| Mertanen, J2298 | ½-½ | Koskinen, Hen2244 | TCh-FIN 2016-17 | 2017 |
| Mertanen, J2390 | 1-0 | Koskinen, Hen2257 | TCh-FIN SM 2012-13 | 2013 |