Chess Board
[ECO code A09]
TRANSPOSITION
RETI'S OPENING to QUEEN'S GAMBIT DECLINED
Black set a QP with KP support, threatening White's undefended QBP but aiming to maintain the centre.
White transposes to Moscow / Vienna / Catalan lines of the Queen's Gambit Declined by a Queen's Pawn move to the centre, freeing his QB for a 3..Kt-KB3, 4.B-Kt5 pin while his QBP stays en prise. W-Alt.
    White  Black    Transp.White Black
 1. Kt-KB3 P-Q4	    (1.	P-Q4   P-Q4)
 2. P-B4   P-K3	    (2.	P-QB4  P-K3)
 3. P-Q4	    (3.	Kt-KB3	   )
Continue: Transpose or Undo or Jump or Clear