Chess Board
[ECO code B20]
SICILIAN DEFENCE
Philidor (Bc4) Variation
White develops his Queen's Knight to QB3(c3), defends his KP and resumes control of Q5(d5).
Black's King's Pawn push out to K3(e6) shields his king's weak (ie. less defended) KBP and resumes effective control of his Q4(d5), for a good game.
	White   Black
 1.	P-K4    P-QB4
 2.	B-B4	Kt-KB3
 3.	Kt-QB3  P-K3
Example ends: Undo or Jump or Clear