Chess puzzle (Advantage)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 d6 5. Nxc6 bxc6 6. Bc4 Nf6 7. Nc3 Be7 8.
O-O O-O 9. h3 Be6 10. Bb3 Bxb3 11. axb3 Re8 12. Be3 a6 13. Qd2 d5 14. exd5 cxd5
15. Ne2 Ne4 16. Qd3 Bf6 17. Rxa6 Rxa6 18. Qxa6 Bxb2 19. Bd4 Nd2 20. Re1 *
Position (FEN): 3qr1k1/2p2ppp/Q7/3p4/3B4/1P5P/1bPnNPP1/4R1K1 b - - 3 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1221
Best move: Bxd4