Chess Board
[ECO code C41] Move Move Move Move Here Move Here Move Here
PHILIDOR DEF. - Jaenisch Counter-Attack
(to) Locock Gambit

Black developed his KKt to offset a 4.PxP threat by counter-attacking White's KP. A book by Jaenisch (1813-72) started modern openings development.
White moves his king's-side Knight to KKt5(g5), planning a 4..P-KR3,5.KtxBP gambit. W-Alt.
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	P-Q3
 3.	P-Q4	Kt-KB3
 4.	Kt-Kt5

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