(;GM[1]FF[4]SZ[19]
GN[Solution.]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem91/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem91/Solution

Solution.]
PL[W]

AB[mb][kc][lc][nc][oc][rc][pd][qd][le][lf][mf][ng][og][qg][rg]
AW[mc][md][nd][od][rd][me][oe][pe][qe][re][nf][of]
LB[pa:a]

;W[nb]C[W1]MN[1]
;B[ob]C[B2]MN[2]
;W[qc]C[W3]MN[3]
;B[pc]C[B4]MN[4]
;W[qb]C[W5]MN[5]
;B[rb]C[B6]MN[6]
;W[ra]C[W7]MN[7]
;B[pb]C[B8]MN[8]
;W[qa]C[W9]MN[9]

;LB[pa:a]
)
