Chess puzzle (Crushing)
Moves: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. exd6 Bxd6 6. Bd3 Nf6 7. O-O O-O 8.
Nc3 Bg4 9. h3 Bh5 10. Be2 Bxf3 11. Bxf3 Nc6 12. Bg5 h6 13. Bh4 g5 14. Bg3 Bxg3
15. fxg3 Qe7 16. Re1 Qc5+ 17. Kh1 Rad8 18. Qc1 Nd4 19. Bxb7 Rb8 20. Be4 Nxe4
21. Nxe4 Qxc2 22. Nf6+ Kg7 23. Nd7 Rxb2 24. Qxc2 Nxc2 25. Rab1 Rxb1 26. Rxb1
Rd8 27. Ne5 f6 28. Nf3 Ne3 29. Rb7 Rd1+ 30. Kh2 Nf1+ 31. Kh1 Nd2+ 32. Kh2 Nxf3+
33. gxf3 Rd2+ 34. Kg1 Rxa2 35. Rxc7+ Kg6 36. g4 a5 37. Ra7 a4 38. Kf1 a3 39.
Ke1 f5 40. Ra6+ Kg7 41. gxf5 Ra1+ 42. Ke2 *
Position (FEN): 8/6k1/R6p/5Pp1/8/p4P1P/4K3/r7 b - - 2 42
Black to move.
Themes: Advanced Pawn Endgame, Rook Endgame  
Puzzle rating: 1784
Best move: a2