Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. Bc4 Bg7 5. Bg5 O-O 6. Nf3 Bg4 7. O-O Nc6 8. d5
Ne5 9. Be2 Nxf3+ 10. Bxf3 Bxf3 11. Qxf3 c6 12. dxc6 bxc6 13. Rad1 Qb6 14. b3
Rfe8 15. Na4 Qa6 16. Rfe1 Nd7 17. Bf4 Qa5 18. Bd2 Qb5 19. Bc3 e5 20. Rxd6 Nc5
21. Nxc5 Qxc5 22. Rdd1 f5 23. exf5 e4 24. Rxe4 Qxc3 25. Rxe8+ Rxe8 26. fxg6
Re1+ 27. Rxe1 *
Position (FEN): 6k1/p5bp/2p3P1/8/8/1Pq2Q2/P1P2PPP/4R1K1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 400
Best move: Qxe1#