Chess Board
[ECO code D02] Move Move Here
QUEEN'S PAWN GAME
(to) Colle System (alt. route)

White pushed his KPawn out to K3(e3), tripled his QP support and freed his KB for development.
Black develops his King's Knight to KB3(f6), also tripling his QP support and taking complete control of White's K4(e4).
     White   Black
 1.  P-Q4    P-Q4
 2.  Kt-KB3  P-K3
 3.  P-K3    Kt-KB3  Main 3B,2B route

WHITE to Move or Undo or Jump or Clear
 
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