Chess puzzle (Checkmate)
Opening: Russian_Game, Russian_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nxe5 d5 5. Qf3 Ng5 6. Qxd5 Qxd5 7. Bxd5 Bd6
8. Nc4 Bc5 9. O-O O-O 10. Re1 Na6 11. a3 c6 12. Be4 b5 13. Na5 Bd7 14. Bxc6
Bxc6 15. Nxc6 Rfe8 16. Rxe8+ Rxe8 17. h3 Nb8 18. Nxb8 Bd6 19. Nc3 *
Position (FEN): 1N2r1k1/p4ppp/3b4/1p4n1/8/P1N4P/1PPP1PP1/R1B3K1 b - - 2 19
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 852
Best move: Re1#