Chess puzzle (Advantage)
Moves: 1. d4 d5 2. Bf4 e6 3. Nf3 c5 4. e3 Nc6 5. Bb5 Bd7 6. Nc3 a6 7. Bxc6 Bxc6 8. O-O
Qb6 9. dxc5 Bxc5 10. b3 O-O-O 11. Na4 Bxa4 12. bxa4 Nf6 13. Ne5 Rhf8 14. Qd3 d4
15. Qc4 dxe3 16. Bxe3 Rd5 17. Rab1 Qa5 18. Nd3 Nd7 19. Bxc5 Nxc5 20. Rb2 Rfd8
21. Rfb1 *
Position (FEN): 2kr4/1p3ppp/p3p3/q1nr4/P1Q5/3N4/PRP2PPP/1R4K1 b - - 3 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1540
Best move: Rd4