Lure away the defender
Defenders of a mating square can be lured away. This is shown in the examples.
In example 1 White uses a decoy sacrifice for a checkmating attack!
In example 2 White does not need a sacrifice to lure away the defender. Once again, he has spotted an overloaded piece.
What do you have to do?
Beat the defender of a mating square by luring it away.