Starting position:
-1 denote empty space
The empty space is in lower right position.
Solve puzzle by moving space to the bottom right with the numbers in order.
6 possible directions are symbolized by
4 0
\|
3--*--1
|\
2 5
(i.e. 0 = up, 4 = in, 5 = out)
The solutions given are for a starting position of "diagonal swap" as this
is also used in the cubes puzzles on this site. Solutions for other
starting positions of "offset" and "reverse" and "reverse offset"
solutions may also be available in breadth first search program for cubes
puzzle. A swap of the last 2 tiles is done if the puzzle is not solvable
in starting format.