In “Impasse” (June, page 50), the diagram was mistakenly printed without arrows, making the puzzle impossible to solve. Here is the corrected diagram. Our apologies for the oversight.
![](https://1c7403.p3cdn1.secureserver.net/wp-content/uploads/2017/05/impasse-e1494950154735-1024x743.png)
In “Impasse” (June, page 50), the diagram was mistakenly printed without arrows, making the puzzle impossible to solve. Here is the corrected diagram. Our apologies for the oversight.