Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Bc4 Nc6 3. Nf3 e6 4. c3 d5 5. exd5 exd5 6. Be2 d4 7. cxd4 cxd4 8.
Bc4 Qe7+ 9. Qe2 Qxe2+ 10. Bxe2 Bf5 11. O-O d3 12. Bd1 Bc5 13. Ba4 Nf6 14. Ne5
Rc8 15. Nc3 O-O 16. Nxc6 bxc6 17. Re1 Rfe8 18. Kf1 Rxe1+ 19. Kxe1 Ng4 20. f3
Re8+ 21. Kf1 *
Position (FEN): 4r1k1/p4ppp/2p5/2b2b2/B5n1/2Np1P2/PP1P2PP/R1B2K2 b - - 2 21
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 990
Best move: Nxh2#