Black to move
| Date: | |
| White: | Heiderbeck |
| Black: | Lasker,Em. |
| Combination strength: | 5 |
| Game section | Middle game |
| Decisive material advantage | - |
| Mate combination | The weakness of the back rank |
| Date: | |
| White: | Heiderbeck |
| Black: | Lasker,Em. |
| Combination strength: | 5 |
| Game section | Middle game |
| Decisive material advantage | - |
| Mate combination | The weakness of the back rank |