Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. c4 Bg7 3. Nf3 c6 4. Nc3 d6 5. b3 Nf6 6. Bb2 O-O 7. Rb1 e6 8. e3
Nbd7 9. Bd3 e5 10. dxe5 dxe5 11. e4 Nc5 12. Bc2 Qxd1+ 13. Rxd1 Ncxe4 14. Nxe4
Nxe4 15. Bxe4 Bg4 16. O-O f5 17. Bb1 e4 18. Bxg7 Kxg7 19. Rd7+ Kf6 20. h3 exf3
21. hxg4 fxg4 22. Rxh7 Kg5 23. Rxb7 Rh8 24. gxf3 gxf3 25. Be4 Raf8 26. Bxc6 Rf4
27. Rxa7 *
Position (FEN): 7r/R7/2B3p1/6k1/2P2r2/1P3p2/P4P2/5RK1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1113
Best move: Rg4#