Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Bg5 Bg7 4. e3 e6 5. Nc3 d5 6. Nf3 c5 7. cxd5 cxd4 8. Qxd4
O-O 9. dxe6 Qxd4 10. exf7+ Kxf7 11. Nxd4 Be6 12. Nxe6 Kxe6 13. Bc4+ Kf5 14.
Bxf6 Bxf6 15. e4+ Kf4 16. g3+ Kf3 17. Bd5 Bxc3+ 18. bxc3 Nc6 19. h3 Ne5 20. Rd1
Kg2 21. Ke2 Rxf2+ 22. Ke3 Rf3+ 23. Kd4 Nc6+ 24. Bxc6 bxc6 25. Rdg1+ Kf2 26.
Rf1+ Kxg3 27. Rhg1+ Kf4 *
Position (FEN): r7/p6p/2p3p1/8/3KPk2/2P2r1P/P7/5RR1 w - - 2 28
White to move.
Themes: Pin Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1014
Best move: Rg4#