abcdefgh 8♖□■□■□■♖8 7□■□■♔♙♙♙7 6♙□■□■□■♘6 5□■♛■♟︎♗♕■5 4■□■□■□■□4 3□■□■□■□■3 2♟︎♟︎♟︎□♟︎□♟︎♟︎2 1♜■□■♚♝□♜1 abcdefgh C6 to C5. check