Chess puzzle (Checkmate)
Opening: Elephant_Gambit, Elephant_Gambit_Paulsen_Countergambit
Moves: 1. e4 e5 2. Nf3 d5 3. exd5 e4 4. Qe2 Nf6 5. Nc3 Be7 6. Ng1 O-O 7. Nxe4 Re8 8.
d3 Qxd5 9. Nxf6+ gxf6 10. Be3 Bc5 11. c4 Qe5 12. Nf3 Qh5 13. d4 Bb4+ 14. Nd2
Bg4 15. f3 Qa5 16. O-O-O Bf5 17. Ne4 Qxa2 18. Nxf6+ Kf8 19. Nxe8 *
Position (FEN): rn2Nk2/ppp2p1p/8/5b2/1bPP4/4BP2/qP2Q1PP/2KR1B1R b - - 0 19
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 716
Best move: Qa1#