Chess Board
[ECO code C42]
PETROFF'S DEFENCE
Russian Three Knights Variation
White castles short (ie. K-side) for safety, and brings his King's Rook into play supporting his QBP.
Black's Pawn to Q3(d6) enables 9.Kt-B4..Kt-Q2, 10.B-K3..Kt-K4 to give White only slight advantage.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	Kt-Q3  BxKt
 2. Kt-KB3 Kt-KB3    7.	QPxB   KtxP
 3. Kt-B3  B-Kt5     8.	0-0    P-Q3
 4. KtxP   0-0
 5. B-K2   R-K1
Example ends: Undo or Jump or Clear