Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Semi-Tarrasch_Defense
Moves: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. Nf3 Nf6 5. e3 Be7 6. dxc5 Bxc5 7. cxd5 exd5 8.
Bb5+ Nc6 9. O-O a6 10. Be2 O-O 11. a3 Be6 12. b4 Bd6 13. Bb2 b5 14. Rc1 Rc8 15.
Bd3 Ne5 16. Be2 Nc4 17. Qc2 Nxa3 *
Position (FEN): 2rq1rk1/5ppp/p2bbn2/1p1p4/1P6/n1N1PN2/1BQ1BPPP/2R2RK1 w - - 0 18
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1144
Best move: Bxa3