Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. Nf3 Nc6 2. d4 d5 3. c4 Nf6 4. cxd5 Nxd5 5. Nc3 Bg4 6. e4 Ndb4 7. a3 Bxf3 8.
gxf3 Na6 9. Be3 e6 10. b4 Naxb4 11. axb4 Bxb4 12. Qd3 Qf6 13. Be2 O-O-O 14. Rd1
*
Position (FEN): 2kr3r/ppp2ppp/2n1pq2/8/1b1PP3/2NQBP2/4BP1P/3RK2R b K - 5 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1625
Best move: Nxd4