Chess Board
[ECO code C67] Move Move Move Here Move Here
RUY LOPEZ - Open Berlin Def.
Side Variation (towards Riga Var.)
Black advanced his base QP to Q4(d5) to defend his KKt, and freed his QB but self-pinned his QKt.
White's KB3(f3) Knight takes the doubled QP on Q4(d4) for a joint attack on the QKt and threatens P-KB3, forcing Black to counterattack. W-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	R-K1   P-Q4
 2. Kt-KB3 Kt-QB3    7.	KtxP
 3. B-Kt5  Kt-B3
 4. 0-0	   KtxP
 5. P-Q4   PxP?!
BLACK to Move or Undo or Jump or Clear
 
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