Nikoli-style pencil puzzles, made by hand.
Sorry, man, but I'm getting multiple valid solutions. The top right corner is the problem here; the other 3 corners solve just fine.Screencap here with one possible solution I found, plus one that a computer solver found:http://postimage.org/image/sp9dp788d/Loving the puzzles so far!
A million apologies. I will go through this weekend and check for any other puzzles with multiple solutions, and see which ones I can fix. This looks fixable.