Chess Board
[ECO code D30]
TRANSPOSITION
QGD (to CATALAN) to QGA (main)
White freed his KB to defend his QBP by a tame KP push out to K3(e3), rejecting 4.Kt-B3 or the Catalan.
Black transposes into the Queen's Gambit Accepted main by taking White's QBP with his Queen's Pawn, rejecting Tarrasch and Semi-Slav lines. B-Alt.
    White  Black    Transp.White Black
 1. P-Q4   P-Q4	    	  (1.)
 2. P-QB4  P-K3	    (2.	P-QB4  PxP   )
 3. Kt-KB3 Kt-KB3   (3.	Kt-KB3 Kt-KB3)
 4. P-K3   PxP	    (4.	P-K3   P-K3  )
Continue: Transpose or Undo or Jump or Clear