King's Gambit Declined - classical - Soldatenkov variation
1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5
White moves the king's pawn to e4. Black plays the king's pawn to e5. White pushes the f-pawn to f4.
Black develops the dark-squared bishop to c5. White develops the knight to f3. Black plays the queen's pawn to d6.
White captures on e5 with the f-pawn.