Find the decisive blow (difficulty 1410)

12345678 hgfedcba

Black to move

Show solution
12345678 hgfedcba
  1. e4–f6 key move
  2. b6–c7
  3. h7–c2

What makes it

A discovered attack, and the knight carries it through. The shot starts with the knight. 26 half-moves of forced play.