This is from a game I just played. White has an open h-file to attack black’s king, but there’s a crushing quiet move for black who has the move. What is it?
Black plays Nc5! threatening mate with Nb3#. The king can’t move out of danger and the only way to cover b3 is Qc2 which loses the queen. Moving the b-pawn makes room for the king but loses the queen to Nb3+. White had to play Rh8+ Kxh8 Rh1+ Kg8 Kd1 and lost in short order, being a rook down.