[ECO code C01]
White pushes his threatened Queen's Pawn on to a defended Q5(d5) to challenge Black's KP, rather than transpose into the Sicilian. Black must decide on an open (..PxP) or closed (..P-Q3) reply. W-Alt.
White Black Alt. 1.P-Q4 route 1. P-K4 P-K3 (1. P-Q4 P-QB4) 2. P-Q4 P-QB4 (2. P-Q5 P-K3 ) 3. P-Q5 (3. P-K4 )
BLACK to or Undo or Jump or Clear
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