Find the decisive blow (difficulty 945)

87654321 abcdefgh

White to move

Show solution
87654321 abcdefgh
  1. d5–d6 key move
  2. f7–d5
  3. b6–c7

What makes it

The pawn sets up a forced mate in three. A quiet move, soft as anything, and yet there is no reply. Rated 945 — an approachable find.