Chess puzzle (Checkmate)
Opening: Benoni_Defense, Benoni_Defense_Old_Benoni
Moves: 1. d4 c5 2. c3 d5 3. g3 Nf6 4. Bg2 Nc6 5. Bg5 cxd4 6. Bxf6 gxf6 7. cxd4 Qb6 8.
e3 Bf5 9. Qb3 Nb4 10. Na3 Nd3+ 11. Ke2 Nxb2 12. Bxd5 e6 13. Bxb7 Rb8 14. Bc6+
Qxc6 15. Qxb8+ Kd7 16. Qxa7+ Kd8 17. Nf3 Bd3+ 18. Kd2 *
Position (FEN): 3k1b1r/Q4p1p/2q1pp2/8/3P4/N2bPNP1/Pn1K1P1P/R6R b - - 4 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1564
Best move: Bb4#