Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Taimanov_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. c3 Nf6 6. Bd3 d5 7. exd5 Qxd5 8.
Nf3 e5 9. c4 Bb4+ 10. Nc3 Qd6 11. Ng5 Bg4 12. Qc2 Rd8 13. Be2 Nd4 14. Qa4+ b5
15. Qxa7 Nc2+ 16. Kf1 Bxe2+ 17. Kg1 Qd1+ 18. Nxd1 *
Position (FEN): 3rk2r/Q4ppp/5n2/1p2p1N1/1bP5/8/PPn1bPPP/R1BN2KR b k - 0 18
Black to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 509
Best move: Rxd1#