(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[http://senseis.xmp.net/?ShapeProblem6/NetVariation]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ShapeProblem6/NetVariation

Black to play]
PL[B]

AB[db][eb][dc][ec][fc][bd][cd][ed][fd][be][bf][cf][bg][ch]
AW[da][ea][cb][fb][cc][gc][dd][ce][de][ee][he][df][cg]
CR[he]
LB[fa:a]

;B[gb]C[B1]MN[1]
;W[hb]C[W2]MN[2]

;CR[he]
LB[fa:a]
)
