Queen's Gambit Accepted

Wikipedia Entry "The Queen's Gambit Accepted, commonly abbreviated to QGA, is a chess opening characterized by the opening moves 1.d4 d5 2.c4 dxc4. Black's capture of the white c-pawn may also occur one or two moves later.

The Queen's Gambit is not a real gambit, since Black cannot count on keeping his extra pawn. If White wants to take the pawn back immediately he can play 3.Qa4 Nc6 4.e3 and Black cannot hold on to his extra pawn. However, since playing like this develops the queen somewhat prematurely, White usually plays a bit more patiently"