(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem145/Solution]AP[GoWiki:2009]
DT[2023-02-03]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem145/Solution

Black to play]
PL[B]

AB[pa][qb][ic][lc][mc][qc][jd][nd][qd][le][ne][pe][qf]
AW[lb][mb][nb][pb][jc][pc][kd][od][pd][oe][jf][mf][nf][kg][og]
LB[nc:a][oc:b]

;B[kc]C[B1]MN[1]
;W[jb]C[W2]MN[2]
;B[id]C[B3]MN[3]
;W[ke]C[W4]MN[4]
;B[kb]C[B5]MN[5]
;W[ka]C[W6]MN[6]
;B[ib]C[B7]MN[7]
;W[ja]C[W8]MN[8]
;B[ob]C[B9]MN[9]

;LB[nc:a][oc:b]
)
