A B C D E F G H I J K L M N O
 15 ┌┬┬┬┬┬┬┬┬┬┬┬┬┬┐ 
 14 ├┼┼┼┼┼┼┼┼┼┼┼┼┼┤ 
 13 ├┼┼┼┼┼┼┼┼┼┼┼┼┼┤ 
 12 ├┼┼┼┼┼┼┼┼┼┼┼┼┼┤ 
 11 ├┼┼┼┼○┼●┼┼┼┼┼┼┤ 
 10 ├┼┼┼┼┼●┼┼┼┼●○┼┤ 
  9 ├┼┼┼┼┼┼●┼┼○●┼┼┤ 
  8 ├┼┼┼●●○●┼○●○●┼┤ 
  7 ├┼┼┼┼○○●○●┼●●○┤ 
  6 ├┼┼┼┼○○○●┼┼○○┼┤ 
  5 ├┼┼┼┼┼●○●○●┼┼┼┤ 
  4 ├┼┼┼┼┼┼●┼┼┼┼┼┼┤ 
  3 ├┼┼┼┼┼○┼┼┼┼┼┼┼┤ 
  2 ├┼┼┼┼┼┼┼┼┼┼┼┼┼┤ 
  1 └┴┴┴┴┴┴┴┴┴┴┴┴┴┘ 

[ 1]● ==> H8   [ 2]○ ==> G7   [ 3]● ==> I6   [ 4]○ ==> H6   [ 5]● ==> I5
[ 6]○ ==> I7   [ 7]● ==> J7   [ 8]○ ==> J8   [ 9]● ==> G5   [10]○ ==> K9
[11]● ==> L10  [12]○ ==> J5   [13]● ==> K8   [14]○ ==> H5   [15]● ==> L9
[16]○ ==> M10  [17]● ==> L7   [18]○ ==> L8   [19]● ==> M7   [20]○ ==> M6
[21]● ==> H4   [22]○ ==> G3   [23]● ==> M8   [24]○ ==> N7   [25]● ==> K5
[26]○ ==> L6   [27]● ==> F8   [28]○ ==> F6   [29]● ==> H9   [30]○ ==> F7
[31]● ==> H7   [32]○ ==> G6   [33]● ==> E8   [34]○ ==> G8   [35]● ==> G10
[36]○ ==> F11  [37]● ==> H11