Chess Board
[ECO code A46] Move Move Here
COLLE SYSTEM
Polish Defence (Deferred)
Black advanced his QKtPawn to prevent 3.P-QB4 and enable 3..B-Kt2 to attack White's K4(e4).
White adopts the Colle System, pushing his King's Pawn out to K3(e3) and freeing his KB to attack Black's QKtP (or otherwise play 4.B-Q3). W-Alt.
	White	Black
 1.	P-Q4	Kt-KB3
 2.	Kt-KB3	P-QKt4
 3.	P-K3
BLACK to Move or Undo or Jump or Clear
 
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