Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 c6 2. Nf3 d5 3. e3 Bg4 4. Be2 Nf6 5. c4 e6 6. b3 Nbd7 7. Nc3 Bb4 8. Bd2
Qa5 9. a3 *
Position (FEN): r3k2r/pp1n1ppp/2p1pn2/q2p4/1bPP2b1/PPN1PN2/3BBPPP/R2QK2R b KQkq - 0 9
Black to move.
Themes:  Middlegame  
Puzzle rating: 1024
Best move: Bxc3