Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 8. Bxf6
Qxf6 9. Qd2 Nc6 10. Nb3 Be7 11. O-O-O O-O 12. Be2 b5 13. g4 Bb7 14. h4 b4 15.
Nd5 exd5 16. exd5 Na5 *
Position (FEN): r4rk1/1b2bpp1/p2p1q1p/n2P4/1p3PPP/1N6/PPPQB3/2KR3R w - - 1 17
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1174
Best move: Nxa5