Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Marshall_Gambit
Moves: 1. d4 e6 2. c4 d5 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+
8. Be2 Na6 9. Bd6 Qxg2 10. Bf3 Qg6 11. Ne2 Ne7 12. Nf4 Qh6 13. Nh5 Nf5 14. Rg1
Bd7 *
Position (FEN): r3k2r/pp1b1ppp/n1pBp2q/5n1N/2P5/5B2/PP3P1P/R2QK1R1 w Qkq - 10 15
White to move.
Themes:  Middlegame  
Puzzle rating: 1700
Best move: Bf4