Chess Board
[ECO code D02]
TRANSPOSITION
QP. GAME to QUEEN'S GAMBIT DECLINED
Black's KP supported his QP in a plan to castle early and defend/maintain the centre as long as possible.
White transposes Moscow / Vienna and Catalan lines of the Queen's Gambit Declined by advancing a gambit (ie. undefended) Queen's Bishop's Pawn to QB4(c4) to tempt Black's QP off-centre. W-Alt.
    White  Black    Transp.White Black
 1. Kt-KB3 P-Q4	    (1.	P-Q4   P-Q4)
 2. P-Q4   P-K3	    (2.	P-QB4  P-K3)
 3. P-B4	    (3.	Kt-KB3	   )
Continue: Transpose or Undo or Jump or Clear