Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. e4 Bg7 3. Nc3 c6 4. Be3 Qb6 5. Rb1 d6 6. Qd2 Nf6 7. f3 Qa5 8. Bc4
O-O 9. a4 d5 10. exd5 cxd5 11. Nxd5 Qxd2+ 12. Kxd2 Nxd5 13. Bxd5 Rd8 14. Bb3
Bxd4 15. Bxd4 Rxd4+ 16. Ke3 Nc6 17. Ne2 Rd8 18. Rhd1 Bd7 19. Bd5 e6 20. Be4 f5
21. Bd3 e5 22. Bc4+ Kg7 23. Nc3 Be8 24. Bd5 Rac8 25. Nb5 a6 26. Bxc6 Bxc6 27.
Nd6 Rb8 28. a5 Kf6 29. c4 Ke7 30. c5 Rd7 31. Rd2 Rbd8 32. Rbd1 Ba4 33. Rc1 Ke6
34. Rc4 Bc6 35. Rb4 g5 36. Rb6 h5 37. Rd3 g4 38. Rdb3 f4+ 39. Kf2 Kd5 40. Rd3+
Kxc5 *
Position (FEN): 3r4/1p1r4/pRbN4/P1k1p2p/5pp1/3R1P2/1P3KPP/8 w - - 0 41
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1912
Best move: b4#