Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Other_variations
Moves: 1. e4 c5 2. Bb5 e6 3. Nf3 a6 4. Ba4 b5 5. Bb3 c4 6. Nc3 cxb3 7. axb3 Nc6 8. O-O
Qc7 9. d4 Bb7 10. g3 Nf6 11. Bf4 d6 12. e5 dxe5 13. Nxe5 O-O-O 14. Nc4 Qd7 *
Position (FEN): 2kr1b1r/1b1q1ppp/p1n1pn2/1p6/2NP1B2/1PN3P1/1PP2P1P/R2Q1RK1 w - - 3 15
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 950
Best move: Nb6#