b
7b
 +-----------------+
8| r r r r r r r r |
7| c d h m e h d c |
6|                 |
5|                 |
4|                 |
3|                 |
2|                 |
1|                 |
 +-----------------+
   a b c d e f g h

8 choices initial step
23886 total move combinations
3353 unique moves
14.03% are unique

