Chess puzzle (Equality)
Moves: 1. c4 Nf6 2. Nf3 e6 3. a3 c5 4. Nc3 d5 5. d3 d4 6. Ne4 Nc6 7. Nxf6+ Qxf6 8. Bg5
Qg6 9. g3 Be7 10. Bxe7 Kxe7 11. Nh4 Qf6 12. Bg2 Bd7 13. Qd2 Rhg8 14. e3 Rae8
15. Nf3 e5 16. exd4 Nxd4 17. Nxd4 exd4 18. O-O Bc6 19. Rfe1+ Kf8 20. Rxe8+ Kxe8
21. Re1+ Kd7 22. Qa5 Bxg2 23. Kxg2 Qc6+ 24. f3 g5 25. g4 f6 26. Qd2 h5 27. h3
h4 28. Qe2 Qd6 29. Qf2 Re8 30. Rxe8 Kxe8 31. Kf1 a6 32. Ke2 b5 33. b3 bxc4 34.
bxc4 Qb6 35. Kf1 Qb1+ 36. Qe1+ Qxe1+ 37. Kxe1 a5 38. Kd2 Ke7 39. Kc2 a4 40. Kd2
Ke6 41. Ke2 Ke5 42. Kf2 Kf4 43. Ke2 Kg3 44. Kf1 Kxh3 45. Kf2 Kh2 46. f4 h3 *
Position (FEN): 8/8/5p2/2p3p1/p1Pp1PP1/P2P3p/5K1k/8 w - - 0 47
White to move.
Themes: Defensive Move, Zugzwang Endgame, Pawn Endgame  
Puzzle rating: 1571
Best move: f5