Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 Nf6 2. e3 e6 3. Nf3 d5 4. Bd3 Be7 5. c3 b6 6. O-O c5 7. h3 Ba6 *
Position (FEN): rn1qk2r/p3bppp/bp2pn2/2pp4/3P4/2PBPN1P/PP3PP1/RNBQ1RK1 w kq - 1 8
White to move.
Themes:  Opening  
Puzzle rating: 1543
Best move: Bxa6