Find the decisive blow (difficulty 1215)

87654321 abcdefgh

White to move

Show solution
87654321 abcdefgh
  1. d7–c6 key move
  2. f3–c6
  3. b5–c6

What makes it

A bishop move and a 3-point investment: mate in five. A fork: two or three pieces fall under attack together. It calculates 9 plies deep.