Chess puzzle (Checkmate)
Opening: Scandinavian_Defense, Scandinavian_Defense_Mieses-Kotroc_Variation
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nf3 Bg4 4. Be2 Nc6 5. d4 O-O-O 6. c3 e5 7. O-O exd4 8.
Nxd4 Bxe2 9. Qxe2 Nxd4 10. cxd4 Qxd4 11. Be3 Qa4 12. b3 Qa5 13. Rc1 Bd6 14. Nd2
Qe5 15. Qg4+ f5 16. Qh3 Nf6 17. Nc4 Qe6 18. Bxa7 Ng4 *
Position (FEN): 2kr3r/Bpp3pp/3bq3/5p2/2N3n1/1P5Q/P4PPP/R1R3K1 w - - 1 19
White to move.
Themes: Pin Middlegame Mate in 1 
Puzzle rating: 1424
Best move: Nb6#