Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Old_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e3 c6 4. Bxc4 e6 5. Nf3 Be7 6. Bd2 Nf6 7. O-O O-O 8. Nc3
Nbd7 9. Bd3 Nb6 10. a4 Nbd5 11. e4 Nxc3 12. bxc3 b5 13. Ra3 *
Position (FEN): r1bq1rk1/p3bppp/2p1pn2/1p6/P2PP3/R1PB1N2/3B1PPP/3Q1RK1 b - - 1 13
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1010
Best move: Bxa3