Chess puzzle (Advantage)
Opening: Italian_Game, Italian_Game_Two_Knights_Defense
Moves: 1. e4 Nc6 2. Nf3 e5 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3+ Qf6
8. Bxd5+ Be6 9. Bxe6+ Kxe6 10. Qb3+ Kd7 11. Qxb7 Bc5 12. O-O Nd4 13. Qd5+ Qd6
14. Qxd6+ cxd6 15. Na3 *
Position (FEN): r6r/p2k2pp/3p4/2b1p3/3n4/N7/PPPP1PPP/R1B2RK1 b - - 1 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1930
Best move: Bxa3