19 reviews
Black Magic (or at least still very dark gray one). I think I did this wrong... Good advanced beginner. A nice little optimization lesson Very sweet! (the other day I got it 1st try, and today the 3rd try). :) Pffff... Am so bad at such ones... Needed 7 tries to get the right one. It's never obvious to me. :( Nice hole filling optimization level. Several possibilities to be inefficient. 
