abcdefgh 8♖□♗♕♔♗■♖8 7♙♙♙♙□♙♙♙7 6■□♘□■□■♘6 5□■□■♟︎■□■5 4■□■□■□■□4 3□■♞■□♞□■3 2♟︎♟︎♟︎♟︎♟︎□♟︎♟︎2 1♜■♝♛♚♝□♜1 abcdefgh B1 to C3