Black to move
| Date: | 1976 |
| White: | Bonner |
| Black: | Medina |
| Combination strength: | 6 |
| Game section | Opening |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |
| Date: | 1976 |
| White: | Bonner |
| Black: | Medina |
| Combination strength: | 6 |
| Game section | Opening |
| Decisive material advantage | Pawn promotion |
| Mate combination | - |