Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 d6 3. g3 Nf6 4. Bg2 Nc6 5. d3 Qb6 6. f4 e6 7. Nf3 Nd4 8. O-O
Nxf3+ 9. Qxf3 Be7 10. Kh1 O-O 11. g4 Qc7 12. g5 Ne8 13. Qh5 b5 14. Rf3 b4 15.
Rh3 h6 16. f5 exf5 *
Position (FEN): r1b1nrk1/p1q1bpp1/3p3p/2p2pPQ/1p2P3/2NP3R/PPP3BP/R1B4K w - - 0 17
White to move.
Themes:  Middlegame  
Puzzle rating: 1821
Best move: Nd5