Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Nf6 5. Bg5 Be7 6. Nbd2 O-O 7. Bb5 c6 8.
Ba4 Bf5 9. O-O h6 10. Bh4 Nbd7 11. c3 Re8 12. Re1 Ne4 13. Nxe4 Bxe4 14. Bg3 Nb6
15. Bc2 Bxc2 16. Qxc2 Bf6 17. b3 Nd7 18. Rxe8+ Qxe8 19. Re1 Qd8 20. Ne5 Bxe5
21. Bxe5 Nxe5 22. dxe5 Qg5 23. e6 fxe6 24. Rxe6 Kf7 25. Re3 Re8 26. Rg3 *
Position (FEN): 4r3/pp3kp1/2p4p/3p2q1/8/1PP3R1/P1Q2PPP/6K1 b - - 4 26
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 848
Best move: Re1#