Chess Board
[ECO code D30] Do not scroll the screen..! Move Move Move Move Here Move Here Move Here Move Here
QUEEN'S GAMBIT
(to) Moscow / Vienna Vars. / Catalan QG.
Black declined White's QBP gambit and pushed his KP out to defend his QP in the orthodox manner.
White develops his King's Knight to double his QP support and control KKt5(g5) for a 3..Kt-KB3, 4.B-Kt5 pin, still with a QBP en prise. This prelude to a Catalan gives Black options to transpose. W-Alt.
     White   Black
 1.  P-Q4    P-Q4  Transp.via Anglo-Fr.
 2.  P-QB4   P-K3  Transp.from Reti O.
 3.  Kt-KB3	   Alt. 3W,1W route
BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves Queen's Bishop's Pawn:

P-QB4 (c5) or P-QB3 (c6) ?

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