Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2
Qxb2 9. Rb1 Qa3 10. e5 dxe5 11. fxe5 Ng4 12. Ndb5 axb5 *
Position (FEN): rnb1kb1r/1p3ppp/4p3/1p2P1B1/6n1/q1N5/P1PQ2PP/1R2KB1R w Kkq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1414
Best move: Qd8#