Chess Board
[ECO code C41] Move Move Move Move Here Move Here Move Here
PHILIDOR'S DEFENCE
(to) Albin / "Opera Box" Variations

Black's QB set a weak pin on the KKt to deter 4.PxP (weak because an open B-for-Kt can ensue).
White's Queen's Pawn still removes Black's king's pawn on K5(e5), inviting a pawn exchange so as to then exchange queens (breaking the B pin) for 6.KtxP to win a pawn and prevent ..0-0.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	P-Q3
 3.	P-Q4	B-Kt5?!
 4.	PxP!

BLACK to Move or Undo or Jump or Clear
 
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