Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Other_variations
Moves: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. Bg5 Be7 6. e3 O-O 7. Qc2 a6 8. h4 h6
9. Bf4 Nbd7 10. g4 Nxg4 11. Rg1 f5 12. Ne5 Ndxe5 13. dxe5 Bxh4 14. Rxg4 fxg4
15. O-O-O Bg5 16. cxd5 exd5 17. Bg3 Be6 18. Ne2 Qa5 19. Nd4 Bf5 *
Position (FEN): r4rk1/1p4p1/p1p4p/q2pPbb1/3N2p1/4P1B1/PPQ2P2/2KR1B2 w - - 6 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1083
Best move: Nxf5