Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Old_Sicilian
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bc4 e6 4. Nc3 Nf6 5. e5 Nd5 6. Nxd5 exd5 7. Bxd5 Be7 8.
c4 O-O 9. Qc2 Qc7 10. d4 cxd4 11. Ng5 *
Position (FEN): r1b2rk1/ppqpbppp/2n5/3BP1N1/2Pp4/8/PPQ2PPP/R1B1K2R b KQ - 1 11
Black to move.
Themes:  Opening  
Puzzle rating: 2130
Best move: Bxg5