Chess puzzle (Advantage)
Opening: Vienna_Game, Vienna_Game_Stanley_Variation
Moves: 1. e4 e5 2. Bc4 Nf6 3. Nc3 Bb4 4. Qf3 Nc6 5. a3 Bxc3 6. Qxc3 d6 7. f4 Nxe4 8.
Qf3 d5 9. Bb3 Nd4 10. Qh5 Nxb3 11. cxb3 exf4 12. Qe5+ Be6 13. Qxg7 Qf6 14. Qxf6
Nxf6 15. Nf3 O-O-O 16. d4 Kb8 17. Bxf4 Ne4 18. Rc1 Bg4 19. Ne5 Bh5 *
Position (FEN): 1k1r3r/ppp2p1p/8/3pN2b/3PnB2/PP6/1P4PP/2R1K2R w K - 5 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1816
Best move: g4