Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Na3 cxd4 7. Nb5 Na6 8.
Qxd4 Qxd4 9. Nfxd4 Bd7 10. Bf4 O-O-O *
Position (FEN): 2kr1b1r/pp1b1ppp/n3pn2/1N6/3N1B2/2P5/PP3PPP/R3KB1R w KQ - 3 11
White to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 1275
Best move: Nxa7#