Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 Nf6 2. e3 e6 3. Nf3 d5 4. Bd3 Bb4+ 5. Bd2 Bd6 6. O-O Nc6 7. c4 dxc4 8.
Bxc4 a6 9. a4 Na5 *
Position (FEN): r1bqk2r/1pp2ppp/p2bpn2/n7/P1BP4/4PN2/1P1B1PPP/RN1Q1RK1 w kq - 1 10
White to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1147
Best move: Bxa5