Chess Board
[ECO code B28] Move Move Here
SICILIAN DEFENCE - O'Kelly Var.
Maroczy to Reti Var. (or Maroczy Bind)
White's QPawn advance to Q4(d4) enables both 5.P-Q5 and 5.P-K5 (a strong centre) and frees his QB.
Black's QB4(c5) Pawn removes White's QP to stop White gaining space by a further P advance, and invites capture to gain a 2-to-1 centre P majority.
	White	Black
 1.	P-K4	P-QB4
 2.	Kt-KB3	P-QR3
 3.	P-B4    P-Q3
 4.	P-Q4    PxP
WHITE to Move or Undo or Jump or Clear
 
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