38. Split a pentomino-hedgehog

Start with the shape of a hedgehog.

Fill the shape with a set of pentominoes.
Cut a solution in two parts, without cutting up any of the pentominoes. Maximize the length of the cut.
In the solution below a cut of length 19 is drawn.


An excellent aid for searching solutions is the program �FlatPoly2�. You can download it from the homepage from Aad van de Wetering, Driebruggen, the Netherlands.