Chess Board
[ECO code C01]
(FRENCH) KINGSTON DEFENCE
Advance Variation
White develops his King's Knight to KB3(f3) and doubles support for his centre pawns.
Black's King's Bishop's Pawn advance to an undefended QB4(c5) frees his Q and challenges White's QP, for 5.PxP..Kt-KKt3 or 5.P-B3..QKt-B3.
	White   Black
 1.	P-K4    P-K3
 2.	P-Q4    P-KB4
 3.	P-K5	Kt-K2
 4.	Kt-KB3	P-B4
Example ends: Undo or Jump or Clear