Chess Board
[ECO code B01] Move Move Here
CENTRE COUNTER (or SCANDIN.) DEF.
White took the opportunity to place his QP in the vacant centre, contesting K5(e5) and freeing his QB.
Black usually develops his King's Knight (rather than 4..P-K4) in reply, enabling a 5.Kt-B3..B-Kt5 pin and making a first step towards K-side castling. B-Alt.
	White	Black
 1.	P-K4	P-Q4
 2.	PxP	QxP
 3.	Kt-QB3	Q-QR4
 4.	P-Q4	Kt-KB3
WHITE to Move or Undo or Jump or Clear
 
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