(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem118/Solution]AP[GoWiki:2009]
DT[2023-02-03]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem118/Solution

Black to play]
PL[B]

AB[lb][ic][jc][lc][pc][kd][md][nd][od][pd][rd][he][pe][if][pf][qf][rf][kg][mg][ng][oh][pi][qj]
AW[pb][mc][nc][oc][qc][rc][jd][ld][qd][je][ke][le][me][qe][re][nf][og][ph][qh][qi][rj][ql]
LB[sf:a]

;B[qb]C[B1]MN[1]
;W[ob]C[W2]MN[2]
;B[rb]C[B3]MN[3]
;W[sb]C[W4]MN[4]
;B[sd]C[B5]MN[5]
;W[ra]C[W6]MN[6]
;B[se]C[B7]MN[7]
;W[qa]C[W8]MN[8]
;B[of]C[B9]MN[9]
;W[pg]C[W10]MN[10]

;LB[sf:a]
)
