Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...f5/4. d3

= Rousseau Gambit Declined = White makes his best response leaving Black with the difficult position resulting from the Rousseau Gambit Declined.

Theory table
1.e4 e5 2.Nf3 Nc6 3.Bc4 f5 4.d3