Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Accelerated_Move_Order
Moves: 1. c4 e6 2. Nc3 c6 3. d4 d5 4. e3 Bd6 5. cxd5 exd5 6. Bd3 f5 7. Nf3 Nf6 8. Ne5
O-O 9. f4 Ne4 10. Nxe4 fxe4 11. Be2 Nd7 12. O-O Nf6 13. Qe1 Be6 14. Bd2 Be7 15.
Qg3 Nd7 16. Bg4 Bxg4 17. Qxg4 Nxe5 18. dxe5 g6 19. Bc3 Qe8 *
Position (FEN): r3qrk1/pp2b2p/2p3p1/3pP3/4pPQ1/2B1P3/PP4PP/R4RK1 w - - 2 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1835
Best move: f5