411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. d4/2...exd4/3. Bc4
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
von der Lasa gambit C21 Center game accepted
3. Bc4 · von der Lasa gambit
White gambits their d4 pawn. After either 3...Nf6 or 3...Nc6, this will transpose into other openings.
3...Nf6 is Black's most common move, transposing to the Urusov gambit which is more normally seen from the Bishop's opening with 1. e4 e5 2. Bc4 Nf6 3. d4 exd4.
3...Nc6 is another good move developing the queenside knight. This often transposes to the Scotch gambit after the normal and common developing move 4. Nf3.
Theory table
34Urusov gambit(by transposition)...
Nf6Nf3
Bb4+=Dubois Réti defence(by transposition)...
Nc6Nf3
Nf6=
References