Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Bf5 3. Nf3 Nf6 4. e3 Nbd7 5. Bb5 c6 6. Bd3 Bg6 7. O-O e6 8. Nc3
Ne4 9. Bg5 *
Position (FEN): r2qkb1r/pp1n1ppp/2p1p1b1/3p2B1/3Pn3/2NBPN2/PPP2PPP/R2Q1RK1 b kq - 3 9
Black to move.
Themes:  Opening  
Puzzle rating: 1335
Best move: Nxg5