Chess Board
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NIMZO-INDIAN DEF. - Steiner Variation
Three Knights Variation (alt. route)
Black best advanced his QBP to QB4(c5), threatening White's QP to draw it forward or off-centre.
White develops his King's Knight to KB3(f3) and defends his QP. W-Alt.
     White   Black
 1.  P-Q4    Kt-KB3
 2.  P-QB4   P-K3
 3.  Kt-QB3  B-Kt5
 4.  P-KKt3  P-B4
 5.  Kt-B3	    Main 5W,4W 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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