Chess puzzle (Crushing)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 d6 7. Bc4 Be7 8. h3
O-O 9. O-O a6 10. a4 Na5 11. Bd3 Bd7 12. b4 Nc6 13. Na2 Nd4 14. Nxd4 exd4 15.
a5 Bc6 16. Bb2 Nxe4 17. Bxd4 Bf6 18. Bxf6 Qxf6 19. Qe2 Ng5 20. c4 *
Position (FEN): r4rk1/1p3ppp/p1bp1q2/P5n1/1PP5/3B3P/N3QPP1/R4RK1 b - - 0 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1807
Best move: Bf3