Chess puzzle (Checkmate)
Opening: Benoni_Defense, Benoni_Defense_Old_Benoni
Moves: 1. d4 c5 2. c3 cxd4 3. cxd4 d5 4. Nc3 Nc6 5. Bf4 Qb6 6. Nxd5 Qa5+ 7. Nc3 e6 8.
a3 Nf6 9. f3 Qb6 10. b4 Qxd4 11. Qxd4 Nxd4 12. Kd1 Bd7 13. e3 Nc6 14. Nb5 O-O-O
15. Rc1 a6 *
Position (FEN): 2kr1b1r/1p1b1ppp/p1n1pn2/1N6/1P3B2/P3PP2/6PP/2RK1BNR w - - 0 16
White to move.
Themes: Pin Opening Mate in 1 
Puzzle rating: 1392
Best move: Na7#