Chess puzzle (Advantage)
Opening: Zukertort_Opening, Zukertort_Opening_Other_variations
Moves: 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. d4 Nc6 5. a3 Be7 6. Nc3 O-O 7. cxd5 Nxd5 8.
Nxd5 Qxd5 9. Bd3 Qd8 10. O-O Bd7 11. b4 a6 12. Bb2 Bf6 13. Rc1 Qe7 14. Bb1 Rad8
15. Qd3 g6 16. Ne5 Nxe5 17. dxe5 Bg7 18. Rfd1 *
Position (FEN): 3r1rk1/1ppbqpbp/p3p1p1/4P3/1P6/P2QP3/1B3PPP/1BRR2K1 b - - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1818
Best move: Ba4