Chess Board
[ECO code C41] Do not scroll the screen..! Move Move Here Move Here
PHILIDOR'S DEFENCE
Jaenisch Counter-Attack (alt. route)
Black developed his king's knight to KB3(f6) contesting his Q4(d5) and ready to adopt Jaenisch's 1842 counter attack line against White's KP.
White's Pawn to Q4(d4) frees his QB and attacks Black's KP, rejoining the main offshoot. W-Alt.
     White   Black
 1.  P-K4    P-K4
 2.  Kt-KB3  P-Q3
 3.  Kt-B3   Kt-KB3
 4.  P-Q4	    Main 3W,2W route
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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