It’s a mate in four, which we rarely do, but, in this case, it’s actually a good problem even for beginners. It’s not a mystery what Black is going to do, so White has to prepare for that.
A composition by T.E. Brown. It has “duals,” but is still a very instructional piece on planning: 1.Kg6 [1.Kh6] 1...a1Q 2.Nd7+ [2.Ng4]2...Qxe5 3.Nxe5 b2 4.Nf7#