Chess Board
[ECO code C42] Move Move Here
PETROFF'S DEFENCE
Main line
Black's QP push freed his QB and attacked White's KKt to gain a tempo before recouping by 4..KtxP.
White's Knight under attack on K5(e5) retreats to its initial developed position, even though this (the standard text-move) loses him a tempo. W-Alt.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	Kt-KB3
 3.	KtxP	P-Q3
 4.	Kt-KB3
BLACK to Move or Undo or Jump or Clear
 
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