
Nonblank blocks are lettered sequentially
according to their order in the puzzle file.
Thus, each move is described by a block ID
followed by the move direction {u,d,l,r}:

rush.txt

Solution path with #steps= 62 :


i-d  i-d  j-d  g-d  b-l  k-u  k-u  a-l  a-l  h-d  
h-d  c-l  l-u  l-u  m-u  n-u  n-u  d-r  h-d  a-r  
a-r  i-u  i-u  k-d  b-r  b-r  b-r  g-u  i-u  j-u  
k-u  a-l  a-l  h-u  d-l  n-d  l-d  b-r  n-d  l-d  
c-r  h-u  h-u  a-r  a-r  m-u  d-l  d-l  d-l  m-d  
a-l  a-l  h-d  b-l  h-d  c-l  h-d  a-r  a-r  l-u  
l-u  a-r  
