White to move
| Date: | 1972 |
| White: | Boey |
| Black: | Filip |
| Combination strength: | 6 |
| Game section | Middle game |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |
| Date: | 1972 |
| White: | Boey |
| Black: | Filip |
| Combination strength: | 6 |
| Game section | Middle game |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |