Nails & Glue
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
