(;GM[1]FF[4]SZ[19]
GN[Preventing an extension]
PC[http://senseis.xmp.net/?ExtendingFromAnEnclosure]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ExtendingFromAnEnclosure

Preventing an extension]
PL[B]

AB[ec][cd]
AW[pc][qe]
LB[jc:a]

;B[kc]C[B1]MN[1]

;LB[jc:a]
)
