Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Other_variations
Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 h6 5. Bh4 Bf5 6. e3 e6 7. f3 Bd6 8. e4 dxe4
9. fxe4 Bg4 10. Bxf6 Qxf6 11. Qxg4 Qxd4 12. Nf3 Qf6 13. Bd3 Nd7 14. O-O O-O-O
15. Nd2 *
Position (FEN): 2kr3r/pp1n1pp1/2pbpq1p/8/2P1P1Q1/2NB4/PP1N2PP/R4RK1 b - - 7 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1609
Best move: Qd4+