Chess puzzle (Checkmate)
Moves: 1. c4 Nc6 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Qd7 7. Nf3 f6 8.
O-O h5 9. h4 g5 10. hxg5 fxg5 11. Nxg5 Qg4 12. d4 h4 13. Bh3 Qh5 14. Qb3 Bxh3
15. Nxh3 Rb8 16. Nf4 Qg4 17. Kg2 h3+ 18. Kh2 Bh6 19. Ne6 Qe4 20. Nxc7+ Kd7 21.
Bxh6 *
Position (FEN): 1r5r/ppNkp3/2n4B/8/3Pq3/1QP3Pp/P3PP1K/R4R2 b - - 0 21
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1258
Best move: Qg2#