Chess puzzle (Advantage)
Opening: Vienna_Game, Vienna_Game_Vienna_Gambit
Moves: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 exf4 5. d4 Nxd5 6. Nxd5 Qxd5 7. Bxf4 Bd6
8. Bxd6 Qxd6 9. Qe2+ Be6 10. O-O-O O-O 11. Kb1 Nc6 12. Nf3 Nb4 13. a3 Rfe8 14.
Qb5 a5 15. axb4 axb4 16. Nd2 Qxd4 17. Bd3 c5 18. Nf3 *
Position (FEN): r3r1k1/1p3ppp/4b3/1Qp5/1p1q4/3B1N2/1PP3PP/1K1R3R b - - 1 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1447
Best move: Ba2+