Chess puzzle (Crushing)
Opening: Ruy_Lopez, Ruy_Lopez_Berlin_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bg5 Be7 6. O-O Bd7 7. Nc3 Nd4 8.
Bxd7+ Qxd7 9. Nxd4 exd4 10. Bxf6 Bxf6 11. Nd5 O-O-O 12. Nxf6 gxf6 13. Qh5 Rde8
14. Qa5 a6 15. b4 Re5 16. Qa4 *
Position (FEN): 2k4r/1ppq1p1p/p2p1p2/4r3/QP1pP3/3P4/P1P2PPP/R4RK1 b - - 2 16
Black to move.
Themes: Hanging Piece Endgame  
Puzzle rating: 691
Best move: Qxa4