Chess puzzle (Checkmate)
Opening: Russian_Game, Russian_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Bc4 h6 4. O-O d6 5. Re1 Be7 6. d4 Bg4 7. dxe5 Bxf3 8.
Qxf3 dxe5 9. Be3 Nbd7 10. Nc3 c6 11. Rad1 O-O 12. a3 Rc8 13. Ne2 b5 14. Ba2 Qa5
15. Ng3 c5 16. Nf5 Rfe8 17. Nxe7+ Rxe7 18. Rd6 *
Position (FEN): 2r3k1/p2nrpp1/3R1n1p/qpp1p3/4P3/P3BQ2/BPP2PPP/4R1K1 b - - 1 18
Black to move.
Themes: Hanging Piece, Kingside Attack Middlegame Mate in 1 
Puzzle rating: 817
Best move: Qxe1#