Chess Board
[ECO code A38 > 39] Move Move Move Move Here Move Here
ENGLISH OPENING
Ultra Symmetrical Defence
White's KKt to KB3(f6) contested Q4+K5(d4+e5), negating Black's QKt influence, and enabled castling.
Black deploys his King's Knight. Inferior to 5..P-K4 but set as below in 1960s ECO coding. B-Alt.
     White   Black    
 1.  P-QB4   P-QB4
 2.  Kt-QB3  Kt-QB3
 3.  P-KKt3  P-KKt3
 4.  B-Kt2   B-Kt2  Alt. 5WB,2WB route
 5.  Kt-B3   Kt-B3  Alt. via 5WB,3W-4B
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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