Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Zukertort_Variation
Moves: 1. d4 d5 2. Nf3 Bf5 3. c4 Nf6 4. Nc3 dxc4 5. Qa4+ Nc6 6. Qxc4 e6 7. Qb5 Bd6 8.
Qxb7 *
Position (FEN): r2qk2r/pQp2ppp/2nbpn2/5b2/3P4/2N2N2/PP2PPPP/R1B1KB1R b KQkq - 0 8
Black to move.
Themes:  Opening  
Puzzle rating: 2210
Best move: Nb4