Chess Board
[ECO code C41]
PHILIDOR DEF. - Jaenisch Counter-Attack
(avoiding Locock Gambit)
White develops his King's Bishop to QB4(c4) for a joint attack on Black's weak (under defended) KBP.
Black counter-attacks, moving his Q3(d6) Pawn forward a square to Q4(d5), with equality.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	P-Q3
 3.	P-Q4	Kt-KB3
 4.	Kt-Kt5	PxP
 5.	B-B4 ch P-Q4!
Example ends: Undo or Jump or Clear