Chess Board
[ECO code C43] Do not scroll the screen..! Move Move Here Move Here
PETROFF DEFENCE - Steinitz Attack
(to) Symmetrical Variation (alt. route)
Black's king's knight removed White's king's pawn.
White's KB3(f3) Knight exchanges, removing the Black KP on K5(e5) and creating an open king's-file. This route is regarded as inferior to 4.B-Q3 as it gives Black greater options for transposing. W-Alt.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	Kt-KB3
 3.	P-Q4	KtxP
 4.	KtxP
BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves Queen's Pawn:

P-Q4 (d5) or P-Q3 (d6) ?

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