Chess Board
[ECO code A20] Move Move Move Move Here Move Here Move Here
The Centre Variation

Black's unopposed KP advance to the vacant centre freed his Q (to attack White's K-side) and his KB.
White advances his Queen's Pawn to the centre, freeing his QB and attacking Black's KP. This move is usually only made as a transpositional device. W-Alt.
     White   Black    
 1.  P-QB4   P-K4
 2.  P-Q4	 Transp.from Charlick G

BLACK to Move or Undo or Jump or Clear
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