Find the decisive blow (difficulty 1370)

12345678 hgfedcba

Black to move

Show solution
12345678 hgfedcba
  1. g1–f2 key move
  2. e2–e4
  3. a8–b6
  4. h1–f1
  5. f2–h4
  6. e4–f5
  7. h4–a4
  8. a2–a3

What makes it

The queen settles the game. It calculates 8 plies deep. Difficulty 1370: hard to read in full.