Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nc3 Bf5 4. Bg5 e6 5. e3 h6 6. Bh4 Be7 7. Bd3 Bg6 8. Bxg6
fxg6 9. Bxf6 Bxf6 10. Qg4 O-O 11. Qxg6 dxc4 12. Nf3 c5 13. Qe4 cxd4 14. Qxe6+
Kh8 15. Nxd4 *
Position (FEN): rn1q1r1k/pp4p1/4Qb1p/8/2pN4/2N1P3/PP3PPP/R3K2R b KQ - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 939
Best move: Bxd4