Chess Board
[ECO code C23] Move Move Here
BISHOP'S OPENING
(The) Variation towards Legall's Mate

White's early king's bishop controlled Black's Q4(d5) and attacked Black's weak KB2(f7) square.
Black pushes his Queen's Pawn out one square, to support his KP against a possible 3.Kt-KB3.., 4.KtxKP attack on his king's weakest point KB2(f7), and frees his QB. Inferior (hampering his KB). B-Alt.
	White	Black
 1.	P-K4	P-K4
 2.	B-B4	P-Q3	

WHITE to Move or Undo or Jump or Clear
 
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