Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. Nc3 c6 4. Bg5 g6 5. e3 Bg7 6. Nf3 Be6 7. c5 Ne4 8. Nxe4
dxe4 9. Nd2 Bd5 10. g3 O-O 11. Bg2 f5 12. O-O b6 13. b4 Na6 14. a3 bxc5 15.
bxc5 Nxc5 16. dxc5 Bxa1 *
Position (FEN): r2q1rk1/p3p2p/2p3p1/2Pb1pB1/4p3/P3P1P1/3N1PBP/b2Q1RK1 w - - 0 17
White to move.
Themes:  Middlegame  
Puzzle rating: 1063
Best move: Qxa1