w
20w
 +-----------------+
8|   r c     c     |
7| r   r   r r     |
6|     x   H x d   |
5|           M H r |
4| D d R r       h |
3|     x   e x   r |
2| R   C       E R |
1|     R R R R m   |
 +-----------------+
   a b c d e f g h

27 choices for initial step
204779 total move combinations
15419 unique moves
7.52% are unique


