in reply to Pentominos Solver
Very cool! You may want to checkout Martin Gardners's Hexaflexagons And Other Mathmatical Dieversions. It has a chapter on Pentominos and lots of other interesting things.
"Sanity is the playground of the unimaginative" -Unknown
"Sanity is the playground of the unimaginative" -Unknown
In Section
Cool Uses for Perl