Chess puzzle (Advantage)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Leningrad_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 O-O 5. Rc1 Na6 6. e3 h6 7. Bxf6 Qxf6 8.
Bd3 d5 9. cxd5 Qg5 10. Qf3 exd5 11. Ne2 Bg4 12. Qg3 f5 13. O-O Bd6 14. f4 Qe7
15. Bxa6 bxa6 16. Qf2 Rae8 17. Nxd5 Qe6 18. Nec3 *
Position (FEN): 4rrk1/p1p3p1/p2bq2p/3N1p2/3P1Pb1/2N1P3/PP3QPP/2R2RK1 b - - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1580
Best move: c6