Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. e5 Ne4 6. f3 Qh4+ 7. Ke2 Qf2+
8. Kd3 Bf5 9. fxe4 Rd8+ 10. Kc4 Qd4+ 11. Kb3 Be6+ 12. c4 b5 13. Qc2 a5 14. a3
a4+ 15. Ka2 bxc4 16. Qc3 Qb6 17. Bxc4 Bxc4+ 18. Qxc4 Rd4 19. Qc3 Qb5 20. Qxd4 *
Position (FEN): 4kb1r/2p2ppp/2p5/1q2P3/p2QP3/P7/KP1P2PP/RNB4R b k - 0 20
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1087
Best move: Qb3#