Chess puzzle (Crushing)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 b5 7. f3 e6 8. Qd2
Be7 9. O-O-O Bb7 10. g4 O-O 11. g5 Nh5 12. h4 g6 13. Bh3 e5 14. Nb3 Nd7 15. Bg4
b4 16. Nd5 Bxd5 17. exd5 a5 18. Bxh5 gxh5 19. f4 a4 20. f5 *
Position (FEN): r2q1rk1/3nbp1p/3p4/3PpPPp/pp5P/1N2B3/PPPQ4/2KR3R b - - 0 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1318
Best move: axb3