Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Queens_Knight_Variation
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nc6 4. Nf3 Nf6 5. cxd5 Nxd5 6. Nxd5 Qxd5 7. e3 Bb4+ 8.
Bd2 O-O 9. Bxb4 Nxb4 10. Qb3 *
Position (FEN): r1b2rk1/ppp2ppp/4p3/3q4/1n1P4/1Q2PN2/PP3PPP/R3KB1R b KQ - 1 10
Black to move.
Themes:  Middlegame  
Puzzle rating: 1046
Best move: Qxb3