Chess puzzle (Advantage)
Opening: Scotch_Game, Scotch_Game_Other_variations
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Be7 6. Qxg7 Bf6 7. Qg3 d6
8. Bd3 Be6 9. O-O Qe7 10. c3 O-O-O 11. Be3 Be5 12. Qf3 a6 13. Nd2 Nf6 14. Nc4 *
Position (FEN): 2kr3r/1pp1qp1p/p2pbn2/4b3/2N1P3/2PBBQ2/PP3PPP/R4RK1 b - - 3 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1524
Best move: Bg4