The opening moves in each case are 1. P to K 4, P to K 4; 2. P to Q 4, P
takes P. If White continue 3. P to Q B 3, it is called the _Danish Gambit_,
which is rarely played now. The _Centre Gambit_ is a modification of the
Scotch, and similar to it in many of the continuations. 3. Q takes P
constitutes this Gambit. (Strictly speaking, it is not a _Gambit_, the pawn
not being sacrificed.) Latterly the Centre Gambit has been somewhat
neglected.