Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Scandinavian_Variation
Moves: 1. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nf3 Bg4 5. Be3 Bxf3 6. gxf3 O-O-O 7. c4 Qd7
8. d5 e6 9. Nc3 exd5 10. cxd5 Nce7 11. Bxa7 Nxd5 12. Nxd5 Qxd5 13. Qa4 *
Position (FEN): 2kr1bnr/Bpp2ppp/8/3q4/Q7/5P2/PP3P1P/R3KB1R b KQ - 1 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 994
Best move: Qd2#