Chess puzzle (Checkmate)
Opening: Kings_Gambit_Accepted, Kings_Gambit_Accepted_MacLeod_Defense
Moves: 1. e4 e5 2. f4 Nc6 3. Nf3 exf4 4. d4 d5 5. e5 Be6 6. Bxf4 Qd7 7. Bb5 O-O-O 8.
a4 a6 9. Qd3 axb5 10. axb5 Nb4 *
Position (FEN): 2kr1bnr/1ppq1ppp/4b3/1P1pP3/1n1P1B2/3Q1N2/1PP3PP/RN2K2R w KQ - 1 11
White to move.
Themes:  Opening Back Rank Mate, Mate in 1 
Puzzle rating: 1383
Best move: Ra8#