Sliding Block Puzzles
I found a collection of tricky sliding block puzzles.
By taking photos of them, and writing a little code, we can now Play online.
Beware, they are harder than they look (but you can cheat if you are so inclined).
I solved all of the puzzles myself, but my solutions aren't optimal. So if you cheat, you are only seeing my best effort.
I found Climb 12 the hardest.