Levcic mate in three

Some may say too much material is used, but I've always liked this one anyway. The key move is well hidden and the shown mating net is about as fantastic as it can get on a chessboard.
Dane Levcic, Mezija 1994
White to move and mate in three moves


It also serves as another test of the diagram thingy; I'm not quite decided what piece style I like best for these. If you click on the diagram it should show you the correct Key move too. One key move alone though does not fully solve these problems - you'll need to work out the complete way to mate! (preferably before peeking at the solution)