Chess Board
[ECO code B06] Move Move Here
MODERN DEF. - "Kotov-Robatsch" Var.
(to) Four Pawns Attack

Black's 3..P-Q3 deterred 4.P-K5 and freed his QB.
White takes the opportunity to advance his QBPawn to QB4(c4) (despite creating an increasing target), planning to set 5.Kt-QB3 behind it. W-Alt.
     White   Black
 1.  P-K4    P-KKt3
 2.  P-Q4    B-Kt2
 3.  P-KB4   P-Q3
 4.  P-B4	   Alt. 4W,3W route

BLACK to Move or Undo or Jump or Clear
 
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