in reply to Re^2: Tricky math problem ...
in thread Tricky math problem ...

https://en.m.wikipedia.org/wiki/Polygon_covering

> the square covering problem is linear for hole-free polygons but NP-hard for general polygons

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery FootballPerl is like chess, only without the dice