Find the decisive blow (difficulty 1320)

12345678 hgfedcba

Black to move

Show solution
12345678 hgfedcba
  1. e7–e5 key move
  2. h4–e1
  3. e5–f4

What makes it

A discovered attack, and the pawn carries it through. The shot starts with the pawn. The forced line runs 16 plies.