[ECO code D54 > 69]
(to) Orthodox Defence
Black castles - a waiting move - in preference to moves like 5..Kt-K5 (an early form of Lasker Def.) against White's increasingly positional play. B-Alt.
White Black White Black 1. P-Q4 P-Q4 5. P-K3 0-0 2. P-QB4 P-K3 3. Kt-QB3 Kt-KB3 4. B-Kt5 B-K2
WHITE to or Undo or Jump or Clear
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