Chess puzzle (Advantage)
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. f4 Bf5 6. Nf3 Nc6 7. Bd3 Bg4 8. O-O
Nxd4 9. Be4 Nxf3+ 10. Bxf3 Bxf3 11. Qxf3 c6 12. b3 Qc7 13. Nc3 O-O-O 14. Be3
dxe5 15. fxe5 e6 16. Rad1 Bb4 17. Bd4 Nd7 18. Qxf7 g6 19. Qxe6 Rde8 20. Qd6 *
Position (FEN): 2k1r2r/ppqn3p/2pQ2p1/4P3/1bPB4/1PN5/P5PP/3R1RK1 b - - 2 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1413
Best move: Bxd6