Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. d3 d5 3. exd5 Qxd5 4. Nf3 Nc6 5. Be2 Nf6 6. O-O Bc5 7. b3 O-O 8.
Bb2 Bf5 9. Nc3 Qd6 10. Nb5 Qe7 11. a4 a6 12. Nc3 Rad8 13. Qc1 e4 14. dxe4 Nxe4
15. Nxe4 Qxe4 16. Bd3 Qg4 17. Bxf5 Qxf5 18. c4 Rfe8 19. Re1 Rxe1+ 20. Qxe1 f6
21. Rd1 Rxd1 22. Qxd1 Qe6 23. h3 Kf7 24. Nd4 Nxd4 25. Bxd4 Bd6 26. Qh5+ Kg8 27.
Qg4 *
Position (FEN): 6k1/1pp3pp/p2bqp2/8/P1PB2Q1/1P5P/5PP1/6K1 b - - 4 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 625
Best move: Qe1#