Chess puzzle (Advantage)
Opening: Tarrasch_Defense, Tarrasch_Defense_Symmetrical_Variation
Moves: 1. e3 c5 2. d4 d5 3. Nf3 Nf6 4. c4 e6 5. Nc3 Nc6 6. a3 a6 7. b3 Bd6 8. dxc5
Bxc5 9. Bd3 O-O 10. O-O dxc4 11. Bxc4 Qc7 12. Bb2 b5 13. Be2 Bb7 14. Qc2 Rac8
15. Nxb5 Qb6 16. Bxf6 axb5 17. Bb2 b4 18. Qe4 *
Position (FEN): 2r2rk1/1b3ppp/1qn1p3/2b5/1p2Q3/PP2PN2/1B2BPPP/R4RK1 b - - 1 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1725
Best move: Nd4