Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8.
Nf3 exd5 9. b4 a5 10. b5 c5 11. bxc6 Nxc6 12. e3 O-O 13. Bb5 Bf5 14. O-O Rc8
15. Rc1 h5 16. Qb3 Be4 17. Nxe4 dxe4 18. Nd2 Re8 19. Bxc6 bxc6 20. Qc2 f5 21.
Nb3 h4 22. h3 Bf8 23. Nc5 Qd5 24. a4 Bd6 25. Qc3 Bc7 26. Rb1 Qd6 27. Nb7 *
Position (FEN): 2r1r1k1/1Nb5/2pq2p1/p4p2/P2Pp2p/2Q1P2P/5PP1/1R3RK1 b - - 6 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 400
Best move: Qh2#