Chess Board
[ECO code D18] Move Move Move Move Here Move Here
OPEN SLAV DEFENCE
Lasker Variation

White's King's Bishop developing to QB4(c4) takes Black's doubled QBP (recouping), and enables 0-0.
Black's QR3(a6) Knight to QKt5(b4) threatens a supported 8..Kt-B7+ch fork against White's QR.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6. P-K3   Kt-R3
 2. P-QB4  P-QB3     7.	BxP    Kt-QKt5
 3. Kt-KB3 Kt-B3
 4. Kt-B3  PxP
 5. P-QR4  B-B4

WHITE to Move or Undo or Jump or Clear
 
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When castling always touch the king first
Under FIDE laws of chess, if a player deliberately touches a rook and then his king, he is not allowed to castle on that side on that move but must still move the rook if legally possible.

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