Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. c4 d4 3. e3 Nc6 4. b4 dxe3 5. fxe3 Nxb4 6. Nc3 g6 7. d4 Bg7 8. Bb2
Nh6 9. Qa4+ Nc6 10. d5 Bd7 11. dxc6 Bxc6 12. Qc2 O-O 13. Rd1 Qe8 14. Bd3 Ng4
15. Qe2 Rd8 16. O-O Ne5 17. Nxe5 Bxe5 18. e4 Bd4+ 19. Kh1 e6 20. Nb5 Bxb2 21.
Qxb2 Qe7 22. Bb1 Qc5 23. Nd4 Ba4 24. Rd2 Qxc4 25. Rc1 Qa6 26. Rxc7 *
Position (FEN): 3r1rk1/ppR2p1p/q3p1p1/8/b2NP3/8/PQ1R2PP/1B5K b - - 0 26
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 860
Best move: Qf1#