1.e4 e5 2.Nf3 d6 where 2… d6 marks the Philidor Defense.
White’s usual third move options include 3.Bc4, 3.Nc3 and 3.d4 with the later being the strongest.
Philidor Counter Gambit
White can avoid the Hanham with:
Closed Hanham Variation
White gets no tactical or positional advantage by playing 4.dxe5. E.g.: