(;GM[1]FF[4]SZ[19]
GN[W can't ignore]
PC[http://senseis.xmp.net/?KyuExercise137/Attempts]AP[GoWiki:2009]
DT[2009-10-11]
C[Diagram from http://senseis.xmp.net/?KyuExercise137/Attempts

W can't ignore]
PL[B]

AB[ca][cb][eb][hb][bc][ec][hc][bd][fd][gd][ce][ee][cf][ff]
AW[ab][bb][db][cc][dc][fc][dd][ed]

;B[ba]C[B1]MN[1]
;W[fb]C[W2]MN[2]
;B[ac]C[B3]MN[3]

;
)
