Chess Board
[ECO code E41 > 42] Move Move Move Here Move Here
NIMZO-INDIAN DEF. - Rubinstein System
(to) Rubinstein / Hübner Variations
White's KP push out to K3(e3) freed his KB and his queen's K-side and enabled KKt-K2 if desired.
Black advances his QBPawn enabling 5..Kt-QB3 behind, challenging White's QP and delaying ..P-Q4 until (usually better) after a White B-Q3. B-Alt.
	White	Black
 1.	P-Q4	Kt-KB3
 2.	P-QB4	P-K3
 3.	Kt-QB3	B-Kt5
 4.	P-K3	P-B4
WHITE to Move or Undo or Jump or Clear
 
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