Chess Puzzle - 103

White to move. How should white proceed?

Source: ChessToday.net

Solution : 1.dxe6 Rxd4 2.exf7+ Kh8 3,Ng6+ Kh7 4.f8=N#

If 2...Kf8 3.Ng6# and if 2...Kh7 3.f8=N+ Kh8 4.Nfg6#