Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Qe2+ Qe7 5. d4 h6 6. Be3 Qb4+ 7. Bd2+ Qe7 8.
Nc3 Nf6 9. Qxe7+ Bxe7 10. Ne5 O-O 11. O-O-O Nbd7 12. h4 Nxe5 13. dxe5 d4 *
Position (FEN): r1b2rk1/ppp1bpp1/5n1p/4P3/3p3P/2N5/PPPB1PP1/2KR1B1R w - - 0 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1405
Best move: exf6