Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Old_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qxd4 Qxd4 6. exd4 Bb4+ 7. Bd2
Bxd2+ 8. Nxd2 Nf6 9. Ngf3 O-O 10. O-O c6 11. Rfe1 b5 12. Bb3 Bb7 13. Re2 Ba6
14. Rae1 b4 15. Re7 Nbd7 16. Ng5 Nb6 17. Nxf7 Nfd5 18. Bxd5 *
Position (FEN): r4rk1/p3RNpp/bnp5/3B4/1p1P4/8/PP1N1PPP/4R1K1 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1135
Best move: Nxd5