Checkmate by clearance

Time for a new mating tool!
Sometimes you cannot make mate because one of your own pieces is in the way.
If that’s the case, it is smart to move this piece. By doing so, you open access to a file, diagonal or rank.

Study both example 1 and example 2.
In both positions, there are two pieces behind each other on a file (example 1) of diagonal (example 2).
The front piece gives check. And by clearing away, the back piece can take away flight squares next to the king.
This is a real power trick!

What do you have to do?
Checkmate your opponent by letting your pieces cooperate in a clearance action. Make sure that Black cannot get out of check.
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