C31White25 book lines continue
Falkbeer Countergambit, Charousek Gambit
King's Gambit Declined1. e4 e5 2. f4 d5 3. exd5 e4 4. d3
Also known as KGD: Falkbeer, 4.d3, King's Gambit, Falkbeer Countergambit, Charousek Gambit, King's Gambit, Falkbeer Countergambit.