Blocked Box - Stewart Coffin Design #199 by Henry Strout

This is a clever design by Stewart that is nicely made by Henry.  I was fortunate to have found this copy.

Stewart wrote:

“Six polyomino pieces fit into a 

3x3x3 box that has a cubic block attached to the top midpoint of one side, hence the name. It was presumed to 

have only one solution, but I was never sure until Bill Cutler confirmed it by computer. 

This model was made by Henry Strout for use as an IPP25 exchange puzzle.”