A little collection of puzzles. Some easy, some very difficult...

## Nails and Glue

Your goal in this puzzle is to move the pieces and/or over their respective destinations, and/or , in as few moves as possible. The buttons rotate the board to the right or to the left. After each rotation the mobile pieces fall vertically. If they fall on a nail, or in the proximity of glue , they got stuck. The button Down let the blocked mobiles fall, if possible.*Sometimes you can reach a dead end: the Reset button restarts the current puzzle.*Below you'll find a selection of difficult problems.

I didn't perform an exhaustive search, but while generating millions of random problems, I wrote down the most difficult I found, for each board size and number of symbols (glue, nails, etc.). Below you find a little selections of some difficult problems I found.

10 moves

13 moves

14 moves

16 moves

17 moves

18 moves

20 moves

26 moves

18 moves

19 moves

24 moves

30 moves

34 moves

39 moves

50 moves

27 moves

29 moves

33 moves

39 moves

41 moves

49 moves

42 moves

42 moves

43 moves

44 moves

54 moves