Chess PatternsDiscovered attack
Move one piece out of the way of another, and the piece behind attacks. If the moving piece makes a threat of its own, the opponent faces two at once.
How it works (spoiler)
The bishop leaves the d-file with check, and the rook behind it now hits the queen. Black has to deal with the check first, so the queen falls. Giving up the bishop on h7 doesn’t matter: a queen is worth three of them.