Chess Board
[ECO code D90 > 99] Move Move Move Here Move Here
The Three Knights Variation

Black's ..P-Q4 threatened White's QBP and deterred 4.P-K4, inviting 4.PxP with a plan to exploit a1-h8.
White develops his King's Knight to KB3(f3) to improve his QP support and double his control of Black's K4(e5). W-Alt.
     White   Black
 1.  P-Q4    Kt-KB3
 2.  P-QB4   P-KKt3
 3.  Kt-QB3  P-Q4
 4.  Kt-B3	    Alt. 4W,3W route

BLACK to Move or Undo or Jump or Clear
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