Starting position:
0 and -1 denote empty spaces
The empty spaces are always together in the upper left most positions.
Solve puzzle by moving space(s) to the bottom right with the numbers in order.

6 possible directions are symbolized by
 5   0
  \ /
4--*--1
  / \
 3   2
(i.e. 1 = right, 4 = left)

hexagons_3_3.txt is the solution to the 17 Puzzle
from the 16th International Puzzle Party Exchange gift of David Bagley