Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. c3 b6 4. d4 Nf6 5. e5 Ne4 6. Bd3 Bb7 7. O-O cxd4 8. cxd4
f5 9. Bg5 *
Position (FEN): rn1qkb1r/pb1p2pp/1p2p3/4PpB1/3Pn3/3B1N2/PP3PPP/RN1Q1RK1 b kq - 1 9
Black to move.
Themes:  Middlegame  
Puzzle rating: 1053
Best move: Nxg5