(;GM[1]FF[4]SZ[19]
GN[After B1, Black's marked stone has no true liberties, so Black's move is illegal.]
PC[http://senseis.xmp.net/?LooseGoVariant]AP[GoWiki:2009]
DT[2012-02-20]
C[Diagram from http://senseis.xmp.net/?LooseGoVariant

After B1, Black's marked stone has no true liberties, so Black's move is illegal.]
PL[B]

AB[aa][ca]
AW[bb][bc]
CR[aa]

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

;CR[aa]
)
