Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bc5 6. Be3 d6 7. Nxc6 bxc6 8.
Bxc5 dxc5 9. Qxd8+ Kxd8 10. Rd1+ Bd7 11. Bc4 Rb8 12. b3 Ke7 13. O-O Rhe8 14.
Rfe1 Kf8 15. e5 Ng4 16. Rxd7 Nxe5 17. Rxc7 Nxc4 18. Rxe8+ Rxe8 19. bxc4 *
Position (FEN): 4rk2/p1R2ppp/2p5/2p5/2P5/2N5/P1P2PPP/6K1 b - - 0 19
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 811
Best move: Re1#