Winner 1

Livio Zucca

This is the winner of the fence-competition.
This solution meets the task.
So OB1-3D won our 25 Euro.
He didn’t want the prize. Thank you OB1-3D.

The famous David Singmaster mails us:”The solution on the solid is ingenious and well worth a special prize even if you think he's violated the rules of the contest”.