(;GM[1]FF[4]SZ[19]
GN[]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem15/Solution]AP[GoWiki:2009]
DT[2023-01-30]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem15/Solution

]
PL[W]

AB[sa][nb][pb][sb][lc][mc][pc][qc][nd][od][pd][me][nf][rf][lg][og][pg]
AW[qa][qb][rb][ic][nc][rc][kd][ld][md][qd][rd][ne][oe][pe][qe]
LB[mf:a]

;W[jd]C[W11]MN[11]
;B[le]C[B12]MN[12]
;W[ob]C[W13]MN[13]
;B[oa]C[B14]MN[14]
;W[mb]C[W15]MN[15]
;B[oc]C[B16]MN[16]
;W[lb]C[W17]MN[17]
;B[kc]C[B18]MN[18]
;W[kb]C[W19]MN[19]

;LB[mf:a]
)
