Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Mengarini_Variation
Moves: 1. e4 c5 2. a3 Nc6 3. b4 cxb4 4. axb4 Nxb4 5. c3 Nc6 6. d4 e6 7. d5 exd5 8.
exd5 Qe7+ 9. Be3 Ne5 10. Na3 Nf6 11. Nb5 Kd8 12. Bb6+ axb6 13. Rxa8 *
Position (FEN): R1bk1b1r/1p1pqppp/1p3n2/1N1Pn3/8/2P5/5PPP/3QKBNR b K - 0 13
Black to move.
Themes: Double Check Opening Mate in 1 
Puzzle rating: 1403
Best move: Nf3#