Find the decisive blow (difficulty 1530)

12345678 hgfedcba

Black to move

Show solution
12345678 hgfedcba
  1. e5–f3 key move
  2. h2–g2
  3. f3–d2

What makes it

It starts with a knight move and forces mate in 14. The same move hits two or more targets at once, and nothing covers them all. The forced line runs 27 plies.