Chess Board
[ECO code B03] Move Move Here
(Modern to) Four Pawns / Exch. Vars.

Black's QP to Q3(d6) freed his QB and challenged White's KP, pressuring his command of the centre.
White advances his QBPawn (with KB support) to resume attacking Black's Kt and revert to open play. Less popular at high-level than 4.Kt-KB3. W-Alt.
     White   Black
 1.  P-K4    Kt-KB3
 2.  P-K5    Kt-Q4
 3.  P-Q4    P-Q3
 4.  P-QB4

BLACK to Move or Undo or Jump or Clear
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