Chess puzzle (Checkmate)
Opening: Dutch_Defense, Dutch_Defense_Other_variations
Moves: 1. d4 f5 2. Nf3 d6 3. Bf4 Nc6 4. c3 Nf6 5. g3 e6 6. Bg2 h6 7. O-O Bd7 8. Na3 g5
9. Bd2 Qe7 10. Qb3 O-O-O 11. c4 g4 12. Ne1 Nxd4 *
Position (FEN): 2kr1b1r/pppbq3/3ppn1p/5p2/2Pn2p1/NQ4P1/PP1BPPBP/R3NRK1 w - - 0 13
White to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 884
Best move: Qxb7#