Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. e4 d6 3. Nf3 Be7 4. Nc3 Bd7 5. d5 exd5 6. exd5 Nf6 7. Bg5 c6 8.
dxc6 Nxc6 9. Qe2 Be6 10. O-O-O Qa5 11. a3 d5 12. Qb5 Qc7 13. Bxf6 Bxf6 14. Nxd5
Bxd5 15. Rxd5 O-O 16. Rh5 a6 17. Qd3 g6 18. Rh3 Qb6 19. Qd2 Qxb2+ 20. Kd1 Rad8
21. Bd3 Qa1+ 22. Qc1 Qa2 23. Re1 Bc3 24. Qh6 Qb1+ 25. Ke2 Rde8+ 26. Kf1 Rxe1+
27. Nxe1 *
Position (FEN): 5rk1/1p3p1p/p1n3pQ/8/8/P1bB3R/2P2PPP/1q2NK2 b - - 0 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 699
Best move: Qxe1#