Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Symmetrical_Variation
Moves: 1. d4 Nf6 2. Nf3 d5 3. g3 Bg4 4. Bg2 Nc6 5. O-O e6 6. Nbd2 Bd6 7. e3 Ne4 8. b3
Bb4 9. c4 O-O 10. a3 *
Position (FEN): r2q1rk1/ppp2ppp/2n1p3/3p4/1bPPn1b1/PP2PNP1/3N1PBP/R1BQ1RK1 b - - 0 10
Black to move.
Themes:  Middlegame  
Puzzle rating: 1509
Best move: Bxd2