Chess Board
[ECO code C71] Move Move Move Here Move Here
RUY LOPEZ - Steinitz Defence Deferred
The Duras System

Black's QP supported his KP (but pinned his Kt).
White advances his QBPawn to QB4(c4) to counter 5..P-QKt4, and intends 6.Kt-QB3. Black will usually reply 5..B-KKt5 rather than 5..B-Q2. W-Alt.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	Kt-QB3
 3.	B-Kt5	P-QR3
 4.	B-R4	P-Q3
 5.	P-B4

BLACK to Move or Undo or Jump or Clear
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