[ECO code D90]
(towards) Modern Exchange Variation
White's QBP removes Black's QP with a forcing line so that White's KP can advance unopposed. W-Alt.
White Black 1. P-Q4 Kt-KB3 2. P-QB4 P-KKt3 3. Kt-QB3 P-Q4 4. Kt-B3 B-Kt2 5. PxP Alt. 5W,4W route
BLACK to or Undo or Jump or Clear
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