Chess Board
[ECO code D30]
QGD. TRANSPOSITION
(to CATALAN) to SEMI-TARRASCH/SEMI-SLAV DEF.
Black's KP and KKt tripled his QP support, furthered his K5(e4) control and freed a KB path.
White invites Semi-Tarrasch / Semi-Slav lines by developing his Queen's Knight to QB3(c3). Less ambitious than 4.B-KKt5 or the Catalan. W-Alt.
    White  Black    Transp.White Black
 1. P-Q4   P-Q4		  (1.)
 2. P-QB4  P-K3		  (2.)
 3. Kt-KB3 Kt-KB3   (3.	Kt-QB3 Kt-KB3)
 4. Kt-B3	    (4.	Kt-B3	     )
Continue: Transpose or Undo or Jump or Clear