(;GM[1]FF[4]SZ[19]
GN[Black intrudes?]
PC[http://senseis.xmp.net/?BeginnerExercise222/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise222/Discussion

Black intrudes?]
PL[B]

AB[aa][ca][fa][bb][db][eb][fb][bc][cc][ec][dd][ed]
AW[da][ga][gb][fc][gc][bd][cd][fd][de][ee][fe][cf]
LB[ac:a][be:b][af:c]

;B[ad]C[B1]MN[1]
;W[ae]C[W2]MN[2]

;LB[ac:a][be:b][af:c]
)
