(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem109/Solution]AP[GoWiki:2009]
DT[2023-02-02]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem109/Solution

Black to play]
PL[B]

AB[ra][jb][ob][rb][kc][oc][od][pd][me][ne][re][rf][rg][rh]
AW[pa][sb][mc][pc][qc][rc][nd][qd][oe][qf][qg][oh][qh][qj]

;B[qe]C[B1]MN[1]
;W[pe]C[W2]MN[2]
;B[pb]C[B3]MN[3]
;W[qb]C[W4]MN[4]
;B[oa]C[B5]MN[5]
;W[qa]C[W6]MN[6]
;B[nf]C[B7]MN[7]
;W[og]C[W8]MN[8]
;B[na]C[B9]MN[9]
;W[lb]C[W10]MN[10]

;
)
