Chess puzzle (Equality)
Moves: 1. Nf3 e6 2. d4 d5 3. c4 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O c5 7. cxd5 Nxd5 8.
dxc5 Bxc5 9. e4 Nb6 10. Qe2 Nc6 11. Rd1 Qe7 12. Nc3 Rd8 13. Bg5 f6 14. Rxd8+
Qxd8 15. Rd1 Qe7 16. Bc1 e5 17. Nd5 Qf7 18. b4 Nxb4 19. Qb5 N4xd5 20. Qxc5 Qe7
21. Rxd5 *
Position (FEN): r1b3k1/pp2q1pp/1n3p2/2QRp3/4P3/5NP1/P4PBP/2B3K1 b - - 0 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1641
Best move: Nxd5