Find the decisive blow (difficulty 1395)

87654321 abcdefgh

White to move

Show solution
87654321 abcdefgh
  1. g3–h4 key move
  2. d8–d6
  3. a1–a3
  4. d6–d4
  5. c1–e3
  6. a7–a5
  7. e3–d4
  8. c6–d4

What makes it

The pawn strikes, a 1-point investment, and the attack wins. It calculates 8 plies deep. Difficulty 1395: a demanding calculation.