Chess puzzle (Advantage)
Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. e3 e6 6. cxd5 cxd5 7. Bb5+ Nc6 8.
Ne5 Qc7 9. Qa4 Nd7 10. Nxc6 bxc6 11. Bxc6 Rd8 12. O-O Bd3 13. Rd1 Bc4 14. e4
Rc8 15. Bxd7+ Qxd7 16. Qxd7+ Kxd7 17. f3 Bb4 18. Bd2 Rhd8 19. a3 Ba5 20. b4 Bb6
21. Na4 *
Position (FEN): 2rr4/p2k1ppp/1b2p3/3p4/NPbPP3/P4P2/3B2PP/R2R2K1 b - - 2 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1355
Best move: Bxd4+