Chess puzzle (Advantage)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Normal_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 b6 6. f4 Bb7 7. Nf3 d6 8. O-O
Nbd7 9. Bd2 Re8 10. Rc1 e5 11. fxe5 dxe5 12. dxe5 Nxe5 13. Nxe5 Rxe5 14. Bb1
Rg5 15. e4 Qd4+ 16. Kh1 Rh5 17. Bf4 Qxc4 18. e5 Rh4 19. exf6 *
Position (FEN): r5k1/pbp2ppp/1p3P2/8/1bq2B1r/2N5/PP4PP/1BRQ1R1K b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1646
Best move: Rxf4