Chess puzzle (Crushing)
Moves: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 Nxc3 5. bxc3 Nc6 6. d4 Bg4 7. e3 e5 8.
dxe5 Qxd1+ 9. Kxd1 O-O-O+ 10. Ke1 Bxf3 11. gxf3 Nxe5 12. f4 Nd3+ 13. Bxd3 Rxd3
14. Bb2 Bc5 15. Ke2 Rhd8 16. Rhd1 Rxd1 17. Rxd1 Rxd1 18. Kxd1 f5 19. c4 g6 20.
Ke2 Kd7 21. Be5 Bd6 22. Bd4 b6 23. Kd3 c5 24. Be5 Bxe5 25. fxe5 Ke6 26. f4 a6
27. h4 h6 28. Kc3 b5 29. a4 *
Position (FEN): 8/8/p3k1pp/1pp1Pp2/P1P2P1P/2K1P3/8/8 b - - 0 29
Black to move.
Themes:  Endgame, Pawn Endgame  
Puzzle rating: 1717
Best move: b4+