Chess Board
[ECO code B06] Do not scroll the screen..! Move Move Here Move Here
MODERN (or Robatsch) DEFENCE
Black fianchettoed his KB to exert control over the long dark diagonal so as to attack White's centre.
White sometimes sets his Queen's Bishop's Pawn out one square to QB3(c3), taking the opportunity to strengthen his classical centre (3..BxP being no threat as 4.QxB would target Black's KR). W-Alt. 
     White  Black
 1.  P-K4   P-KKt3
 2.  P-Q4   B-Kt2
 3.  P-QB3	   Transp.from Sarag.O.
BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves Queen's Pawn:

P-Q4 (d5) or P-Q3 (d6) ?

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