Chess puzzle (Crushing)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Normal_Defense
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. e3 dxc4 5. Bxc4 Nc6 6. Nf3 Be7 7. O-O O-O 8. a3
a6 9. b4 b5 10. Bb3 Bd6 11. Bb2 e5 12. d5 e4 13. dxc6 exf3 14. Qxf3 *
Position (FEN): r1bq1rk1/2p2ppp/p1Pb1n2/1p6/1P6/PBN1PQ2/1B3PPP/R4RK1 b - - 0 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1240
Best move: Bg4