Today's puzzle is a famous one (from Morphy's Opera Game). White to move and checkmate in one. What would you play?

In today's challenge it's White to play. In the position below White checkmates in one move. What would you play?

In today's challenge it's White to move and checkmate in one. What would you play?

It is Black's turn to play in the position below. Black can force a checkmate in two moves. What would you play?