Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_London_System
Moves: 1. d4 d5 2. Bf4 Nf6 3. Nf3 e6 4. e3 c5 5. c3 Nc6 6. Bd3 Be7 7. Nbd2 O-O 8. Qc2
h6 9. h3 a6 10. g4 Bd7 11. g5 hxg5 12. Nxg5 Nh5 13. h4 Nxf4 14. exf4 Re8 15.
Ndf3 Qc7 16. Ne5 cxd4 17. cxd4 Rac8 18. Rc1 *
Position (FEN): 2r1r1k1/1pqbbpp1/p1n1p3/3pN1N1/3P1P1P/3B4/PPQ2P2/2R1K2R b K - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 2078
Best move: Qa5+