Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Dragon_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2
O-O 9. O-O-O a6 10. g4 Nb4 11. Kb1 b5 12. a3 a5 13. axb4 axb4 14. Ncxb5 Qa5 15.
Nb3 Qa2+ 16. Kc1 Qa1+ 17. Nxa1 *
Position (FEN): r1b2rk1/4ppbp/3p1np1/1N6/1p2P1P1/4BP2/1PPQ3P/N1KR1B1R b - - 0 17
Black to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 665
Best move: Rxa1#