Chess Board
[ECO code A40] Move Move Move Here Move Here
QUEEN'S PAWN GAME
(to) Colle System (alt. route)

White advanced his KKt to support his QP and dominate K5(e5), starting a Colle System (preparing to open up the centre eventually by P-K4).
Black's Queen's Pawn advance to Q4(d5) frees his QB and takes control of K5(e4), so so that the game may yet become a form of QGD, Slav Defence.
     White   Black
 1.  P-Q4    P-QB3
 2.  Kt-KB3  P-Q4   Main 2B,1B route

WHITE to Move or Undo or Jump or Clear
 
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