Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_Maroczy_Variation
Moves: 1. e4 Nf6 2. d3 e5 3. b3 d5 4. exd5 Qxd5 5. Bb2 Bd6 6. Nf3 O-O 7. Nc3 Qc5 8.
Be2 Nc6 9. O-O Nd4 10. Nxd4 exd4 11. Ne4 Nxe4 12. dxe4 Qe5 13. Bf3 *
Position (FEN): r1b2rk1/ppp2ppp/3b4/4q3/3pP3/1P3B2/PBP2PPP/R2Q1RK1 b - - 2 13
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 870
Best move: Qxh2#