Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Symmetrical_Variation
Moves: 1. d4 d5 2. Nf3 Nf6 3. Nc3 Bf5 4. Bf4 e6 5. e3 a6 6. Bd3 Bg6 7. Qd2 c5 8. O-O
Nc6 9. Ne5 Bd6 10. Nxg6 hxg6 11. Bxd6 Qxd6 12. dxc5 *
Position (FEN): r3k2r/1p3pp1/p1nqpnp1/2Pp4/8/2NBP3/PPPQ1PPP/R4RK1 b kq - 0 12
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 1334
Best move: Qxh2#