Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Nc6 3. Nf3 Nf6 4. e3 e6 5. Nc3 Bd6 6. Bg3 Bxg3 7. hxg3 Ne4 8.
Ne2 f6 9. a3 e5 10. Qd3 exd4 11. Nfxd4 Nxd4 12. Nxd4 c5 13. Qe2 *
Position (FEN): r1bqk2r/pp4pp/5p2/2pp4/3Nn3/P3P1P1/1PP1QPP1/R3KB1R b KQkq - 1 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1550
Best move: cxd4