Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 Bf5 4. c3 e6 5. Nd2 c5 6. Ngf3 Be7 7. Ne5 a6 8. Qb3
b5 9. Bxb5+ *
Position (FEN): rn1qk2r/4bppp/p3pn2/1BppNb2/3P1B2/1QP1P3/PP1N1PPP/R3K2R b KQkq - 0 9
Black to move.
Themes:  Middlegame  
Puzzle rating: 1357
Best move: axb5