Chess Board
[ECO code A17]
TRANSPOSITION
ENGLISH OPG. (Anglo-Ind. Def.) to ORTHODOX QGD
White has advanced his QPawn to the vacant centre.
Black transposes into the "Orthodox Declined" defence of the Queen's Gambit by advancing his own Queen's Pawn to the centre, freeing his QB for a potential B-KKt5 pin and contesting Black's QB4(c5). B-Alt.
    White  Black    Transp.White Black
 1. P-QB4  Kt-KB3   (1.	P-Q4   P-Q4  )
 2. Kt-QB3 P-K3	    (2.	P-QB4  P-K3  )
 3. P-Q4   P-Q4	    (3.	Kt-QB3 Kt-KB3)
Continue: Transpose or Undo or Jump or Clear