Chess puzzle (Crushing)
Opening: Benoni_Defense, Benoni_Defense_Hromadka_System
Moves: 1. d4 c5 2. d5 d6 3. c4 Nf6 4. Nc3 g6 5. e4 Bg7 6. Nf3 O-O 7. Be2 e6 8. O-O b5
9. Nxb5 Nxe4 10. Nd2 exd5 11. cxd5 Nf6 12. Bf3 Bb7 13. Nc3 Nbd7 14. Nde4 Nxe4
15. Nxe4 Ne5 16. Nc3 Nxf3+ 17. Qxf3 Bxc3 18. bxc3 Qa5 19. c4 Qb4 *
Position (FEN): r4rk1/pb3p1p/3p2p1/2pP4/1qP5/5Q2/P4PPP/R1B2RK1 w - - 1 20
White to move.
Themes:  Middlegame  
Puzzle rating: 2083
Best move: Qf6