(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?GokyoShumyoSection2Problem16/Attempts]AP[GoWiki:2009]
DT[2010-02-03]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection2Problem16/Attempts

]
PL[B]

AB[fb][ec][fc][ad][bd][cd][dd]
AW[ea][eb][bc][cc][dc]
LB[ca:a][cb:b]

;B[ab]C[B1]MN[1]
;W[ac]C[W2]MN[2]
;B[bb]C[B3]MN[3]

;LB[ca:a][cb:b]
)
