B_rook  B_knight  B_bishop  B_queen  B_king  B_bishop  B_knight  B_rook
B_pawn  B_pawn    B_pawn    B_pawn   B_pawn  B_pawn    B_pawn    B_pawn
''      ''        ''        ''       ''      ''        ''        ''
''      ''        ''        ''       ''      ''        ''        ''
''      ''        ''        ''       ''      ''        ''        ''
''      ''        ''        ''       ''      ''        ''        ''
W_pawn  W_pawn    W_pawn    W_pawn   W_pawn  W_pawn    W_pawn    W_pawn
W_rook  W_knight  W_bishop  W_queen  W_king  W_bishop  W_knight  W_rook