First move: ##

   A  B  C  D  E  F  G  H
1 |  |  |17|  |  |  |  |  | 1
2 |  |  |10|18|19|20|  |  | 2
3 |  |  |15| 7| 5|16|  |  | 3
4 |  |  |14|()|##| 4|13|  | 4
5 |  |  | 3|##|()| 1| 8|11| 5
6 |  |  | 6| 2|12| 9|  |  | 6
7 |  |  |  |  |  |  |  |  | 7
8 |  |  |  |  |  |  |  |  | 8
   A  B  C  D  E  F  G  H

##:() - 12:12