Philidor - Philidor counter-gambit - del Rio attack
1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6
White plays the king's pawn to e4. Black pushes the king's pawn to e5. White develops the knight to f3.
Black moves the queen's pawn to d6. White plays the queen's pawn to d4. Black plays the f-pawn to f5.
White captures on e5 with the queen's pawn. Black captures on e4 with the f-pawn. White moves the knight to g5.
Black plays the queen's pawn to d5. White pushes the king's pawn to e6.