Chess puzzle (Crushing)
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 Nc6 4. c4 e6 5. a3 dxc4 6. Bxc4 Bd6 7. Bg3 Bxg3 8.
hxg3 Qe7 9. Nf3 Bd7 10. Nc3 O-O-O 11. b4 e5 12. d5 Nd4 13. Nxd4 exd4 14. Qxd4
Kb8 15. Rd1 Ng4 16. d6 cxd6 17. Qxd6+ Qxd6 18. Rxd6 Rhe8 19. Ke2 Ne5 20. Bb3 *
Position (FEN): 1k1rr3/pp1b1ppp/3R4/4n3/1P6/PBN1P1P1/4KPP1/7R b - - 4 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1721
Best move: Bg4+