First move: ##

   A  B  C  D  E  F  G  H
1 |  |  |  |  |  |  |  |  | 1
2 |  |  |  |  |  |  |  |  | 2
3 |  |20|  | 1| 4| 7|18|  | 3
4 |  |  |11|()|##| 5|14|23| 4
5 |  |  | 2|##|()| 9|12|16| 5
6 |  |  | 6| 3|10| 8|13|15| 6
7 |  |  |22|21|17|19|  |  | 7
8 |  |  |  |  |  |  |  |  | 8
   A  B  C  D  E  F  G  H

##:() - 19:8