Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Chigorin_Defense
Moves: 1. d4 d5 2. c4 dxc4 3. Nf3 Nc6 4. Nc3 e6 5. e4 Bb4 6. a3 Ba5 7. b4 cxb3 8. Qxb3
Nxd4 *
Position (FEN): r1bqk1nr/ppp2ppp/4p3/b7/3nP3/PQN2N2/5PPP/R1B1KB1R w KQkq - 0 9
White to move.
Themes:  Opening  
Puzzle rating: 1898
Best move: Nxd4