(;GM[1]FF[4]SZ[19]
GN[a]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem9/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem9/Attempts

a]
PL[B]

AB[fa][bb][ib][bc][ic][ed]
AW[cc][dc][ec][fc][gc][hc][bd][ce]

;B[ea]C[B1]MN[1]
;W[ca]C[W2]MN[2]
;B[cb]C[B3]MN[3]

;
)
