Chess puzzle (Crushing)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 b6 5. a3 Bxc3+ 6. bxc3 Bb7 7. d5 exd5 8.
cxd5 h6 9. Bxf6 Qxf6 10. Rc1 O-O 11. e4 Re8 12. Bd3 Bxd5 13. Qc2 Qe7 14. f3
Qxa3 15. Ne2 Bb7 16. O-O d5 17. exd5 Bxd5 18. Nd4 Qc5 19. Rfe1 Nd7 20. Kh1 Ne5
21. Re2 Nxd3 22. Qxd3 Bc4 23. Rxe8+ Rxe8 24. Qd2 a5 25. h3 b5 26. Qf4 b4 27.
cxb4 axb4 28. Nb3 Qf2 29. Qxc4 Re2 30. Rg1 Re1 31. Rxe1 Qxe1+ 32. Kh2 Qe5+ 33.
f4 Qd6 34. Qd4 Qxd4 35. Nxd4 c5 36. Ne2 c4 37. Kg1 c3 38. Kf1 c2 39. Nc1 b3 40.
Ke1 *
Position (FEN): 6k1/5pp1/7p/8/5P2/1p5P/2p3P1/2N1K3 b - - 1 40
Black to move.
Themes: Advanced Pawn Endgame, Knight Endgame  
Puzzle rating: 556
Best move: b2