Chess puzzle (Advantage)
Moves: 1. d4 Nf6 2. Nf3 d5 3. e3 Bf5 4. Bd3 Bxd3 5. Qxd3 e6 6. O-O Nbd7 7. Nbd2 c5 8.
b3 Rc8 9. Bb2 Be7 10. Ne5 O-O 11. Qb5 Nb6 12. c4 cxd4 13. Bxd4 dxc4 14. Bxb6
Qxd2 15. Bxa7 c3 16. Rfd1 Qb2 17. Rdc1 Rfd8 18. Bd4 Ne4 19. Qf1 Rxd4 20. exd4
c2 21. Nd3 *
Position (FEN): 2r3k1/1p2bppp/4p3/8/3Pn3/1P1N4/Pqp2PPP/R1R2QK1 b - - 1 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1764
Best move: Qxd4