Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Quiet_Variation
Moves: 1. d4 c6 2. Nf3 d5 3. c4 Nf6 4. e3 a6 5. Bd3 Qb6 6. O-O Bg4 7. Nbd2 Nbd7 8. h3
Bh5 9. Qc2 dxc4 10. Bxc4 e6 11. Ne5 Qc7 12. g4 Nxe5 13. dxe5 Bxg4 14. hxg4 Nxg4
15. Qe4 h5 16. f4 Qb6 17. Nf3 Bc5 18. Nd4 O-O-O 19. f5 *
Position (FEN): 2kr3r/1p3pp1/pqp1p3/2b1PP1p/2BNQ1n1/4P3/PP6/R1B2RK1 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1401
Best move: Bxd4