Chess Board
[ECO code D06]
TRANSPOSITION
QGD. (Marshall Def.) to QUEEN'S BISHOP OPG.
Black developed his QB to KB4(f5) to triple his control of White's K4(e4), continuing the Marshall.
White rarely develops his Queen's Bishop to KB4(f4) to triple his K5(e5) control. The transposition enables Black to regain the initiative. W-Alt.
    White  Black    Transp.White Black
 1. P-Q4   P-Q4		  (1.)
 2. P-QB4  Kt-KB3   (2.	Kt-KB3 Kt-KB3)
 3. Kt-KB3 B-B4	    (4.	B-B4   B-B4  )
 4. B-B4	    (3.	P-QB4	     )
Continue: Transpose or Undo or Jump or Clear