Chess Board
[ECO code E40] Move Move Move Here
NIMZO-INDIAN DEF. - Rubinstein Sys.
(Keres to) Botvinnik Variation #2 (alt. route)
Black's QBP to QB4(c5) blockaded White's doubled QBPs, attacked White's QP and invited triple QBPs!
White's KBPawn out to KB3(f3) enables KKt-K2, combining Rubinstein and Samisch lines. W-Alt.
    White  Black	White  Black
 1. P-Q4   Kt-KB3    6.	PxB    P-B4
 2. P-QB4  P-K3	     7.	P-B3
 3. Kt-QB3 B-Kt5
 4. P-K3   P-Q4
 5. P-QR3  BxKt ch  Main 4.P-QR3 route
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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