The set
of one-sided pentominoes.

Use the one-sided pentominoes
to form a fence that encloses an area as large as possible.
The pentominoes must be placed on the same plane, and they must touch along
the full edge of a unit square and not just at the corners.
This solution was made as an example by
Ben De Vreese en Mike Coffijn
from
KSO Glorieux
Ronse,
BeLgium

Do you have our excel file to draw the fence? You can download it here.
'FlatPoly2', a programm by Aad van de Wetering, can be of
great assistance when trying to find a solution. It can be downloaded at his
site .
