Chess Board
[ECO code C52] Move Move Move Here Move Here
(to) Richardson Attack / Lasker Def.

Black's endangered bishop moved to keep up a half-pin on White's QBP+QP (and cramp his QKt).
White castles, bringing his King's Rook into play and breaking the QBP+QP half-pin for 7.P-Q4. W-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	0-0
 2. Kt-KB3 Kt-QB3
 3. B-B4   B-B4
 4. P-QKt4 BxP
 5. P-B3   B-R4

BLACK to Move or Undo or Jump or Clear
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