Chess puzzle (Checkmate)
Moves: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O c5 8. d4
Nc6 9. Nxd5 Qxd5 10. e3 Qh5 11. d5 Rd8 12. e4 Nd4 13. Nxd4 Qxd1 14. Rxd1 Bxd4
15. Rb1 e6 16. Be3 e5 17. b4 b6 18. bxc5 bxc5 19. Bxd4 cxd4 20. Bf1 Bg4 21.
Rdc1 Bf3 22. Bd3 Rac8 23. Kf1 Rxc1+ 24. Rxc1 Rb8 25. Ke1 Rb2 26. Rc2 Rb1+ 27.
Kd2 *
Position (FEN): 6k1/p4p1p/6p1/3Pp3/3pP3/3B1bP1/P1RK1P1P/1r6 b - - 6 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 617
Best move: Rd1#