(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem119/Solution]AP[GoWiki:2009]
DT[2023-02-03]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem119/Solution

Black to play]
PL[B]

AB[cb][dc][fc][ic][lc][nc][cd][ed][id][jd][ld][ge][he][je][ke]
AW[db][ec][hc][kc][mc][hd][kd][md][ie][le][if][jf][kf][mf]

;B[ib]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[ha]C[B3]MN[3]
;W[gb]C[W4]MN[4]
;B[ga]C[B5]MN[5]
;W[fb]C[W6]MN[6]
;B[lb]C[B7]MN[7]
;W[kb]C[W8]MN[8]

;
)
