Chess Board
[ECO code C42]
PETROFF'S DEFENCE
Russian Three Kts Var. - Side Variation
White set his queen's pawn on Q3(d3) to defend his KP and free his QB - but a bad move.
Black's own Queen's Pawn to the centre for (eg.) 6.B-Kt5..PxP gives Black a slight advantage.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	Kt-KB3
 3.	Kt-B3	B-Kt5
 4.	KtxP	0-0
 5.	P-Q3?   P-Q4!
Example ends: Undo or Jump or Clear
 
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