a b c d e f g h
.
   8  r   . q k b . r  8
   7  = = = .   = = =  7
   6  .   n   = n .    6
   5    .   =   b   .  5
   4  .   # # .   .    4
   3    .   .   N # .  3
   2  # # .   # # B #  2
   1  R N B Q K .   R  1
#
      a b c d e f g h