Chess Board
[ECO code C41] Do not scroll the screen..! Move Move Here Move Here
PHILIDOR'S DEFENCE
Jaenisch Counter-Attack

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 develops his Queen's Knight to QB3(c3) to best defend his KP, countering Black's KKt. W-Alt.
     White   Black
 1.  P-K4    P-K4
 2.  Kt-KB3  P-Q3
 3.  P-Q4    Kt-KB3  Alt. W3,W2 route
 4.  Kt-B3	  Transp.from Pillsb.D.

BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves Queen's Knight:

Kt-B3 (Nc6) or QKt-Q2 (Nbd7) ?

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