Chess Board
[ECO code D06] Move Move Here
QUEEN'S GAMBIT - Irregular Defences
The Rubinstein Defence

Black developed his king's knight to KB3(f6), threatening White's newly doubled QP.
White develops his King's Knight to KB3(f3) to support his rear QP and control KKt5(g5). Black usually replies 4..BPxP seeking to transpose. W-Alt.
     White   Black
 1.  P-Q4    P-Q4
 2.  P-QB4   P-QB4
 3.  BPxP    Kt-KB3!
 4.  Kt-KB3	 Transp.from QPG.Krause

BLACK to Move or Undo or Jump or Clear
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