Chess Board
[ECO code C66] Move Move Move Move Here Move Here
RUY LOPEZ - Closed Berlin Def.
Hedgehog Variation
Black developed his KB to K2(e7), and can castle.
White's King's Rook crosses to K1(e1) doubling his KP support, and Black must now give up the centre or face a famous Tarrasch Trap. W-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	Kt-B3  B-K2
 2. Kt-KB3 Kt-QB3    7.	R-K1
 3. B-Kt5  Kt-B3
 4. 0-0    P-Q3
 5. P-Q4   B-Q2
BLACK 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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