White to move
| Date: | 1966 |
| White: | Addison |
| Black: | Costro |
| Combination strength: | 2 |
| Game section | Middle game |
| Decisive material advantage | Problems in cooperation |
| Mate combination | - |
| Date: | 1966 |
| White: | Addison |
| Black: | Costro |
| Combination strength: | 2 |
| Game section | Middle game |
| Decisive material advantage | Problems in cooperation |
| Mate combination | - |