White to move
| Date: | |
| White: | Böök |
| Black: | Koponen |
| Combination strength: | 6 |
| Game section | Middle game |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |
| Date: | |
| White: | Böök |
| Black: | Koponen |
| Combination strength: | 6 |
| Game section | Middle game |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |