[ECO code B03 > 05]
Main line - (to) Modern Variation
White's Pawn to Q4(d4) supports his frontier KP and deters 3..P-QB4 - nowadays the most popular continuation (instead of immediate further attacks on the knight by 3.P-QB4 or 3.Kt-QB3) in top play. W-Alt.
White Black 1. P-K4 Kt-KB3 2. P-K5 Kt-Q4 3. P-Q4
BLACK to or Undo or Jump or Clear
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