Chess puzzle (Checkmate)
Opening: Four_Knights_Game, Four_Knights_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Bc5 5. O-O d6 6. h3 Bd7 7. d3 Qe7 8. Ne2
O-O-O 9. b4 Bd4 10. c3 Bb6 11. a4 a6 12. b5 axb5 13. axb5 Na5 14. Be3 Nxc4 15.
dxc4 Bxe3 *
Position (FEN): 2kr3r/1ppbqppp/3p1n2/1P2p3/2P1P3/2P1bN1P/4NPP1/R2Q1RK1 w - - 0 16
White to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 822
Best move: Ra8#