Chess puzzle (Advantage)
Opening: Vienna_Game, Vienna_Game_Stanley_Variation
Moves: 1. e4 e5 2. Bc4 Nf6 3. Nc3 c6 4. Nf3 d6 5. Ng5 d5 6. exd5 cxd5 7. Bb3 Be7 8. d4
exd4 9. Qxd4 O-O 10. Nxd5 Nc6 11. Qd3 Ne5 12. Qg3 *
Position (FEN): r1bq1rk1/pp2bppp/5n2/3Nn1N1/8/1B4Q1/PPP2PPP/R1B1K2R b KQ - 4 12
Black to move.
Themes:  Opening  
Puzzle rating: 1756
Best move: Nxd5