ａｂｃｄｅｆｇｈ
８♖□■□♔□■♖８
７□♙□■□♙♙♙７
６♙□♞□■□■♘６
５□■□■♟︎♗♕■５ 
４■□■□■□■□４
３□■♛■□■□■３
２♟︎♟︎♟︎□♟︎□♟︎♟︎２
１♜■□■♚♝□♜１
  ａｂｃｄｅｆｇｈ

B4 to C6