Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. e3 Nf6 3. f4 Bg4 4. Nf3 e6 5. Bd3 a6 6. Nbd2 c5 7. c3 Nc6 8. O-O
cxd4 9. exd4 Bd6 10. Nb3 O-O 11. Qe1 b5 12. Ne5 Bxe5 13. fxe5 Nd7 14. Rf4 f5 *
Position (FEN): r2q1rk1/3n2pp/p1n1p3/1p1pPp2/3P1Rb1/1NPB4/PP4PP/R1B1Q1K1 w - f6 0 15
White to move.
Themes:  Middlegame  En Passant
Puzzle rating: 1613
Best move: exf6