Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Variation
Moves: 1. d4 d5 2. Bf4 Bf5 3. Nc3 e6 4. a3 Nf6 5. Nf3 a6 6. Nh4 Ne4 7. Nxf5 Nxc3 8.
bxc3 exf5 9. e3 c5 10. Be2 c4 11. Bf3 Be7 12. Be5 O-O 13. g4 fxg4 14. Bxg4 Qa5
15. Qd2 Nc6 16. Bf4 b5 17. f3 b4 18. cxb4 Nxb4 19. Kf2 *
Position (FEN): r4rk1/4bppp/p7/q2p4/1npP1BB1/P3PP2/2PQ1K1P/R6R b - - 1 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1435
Best move: Nd3+