(;GM[1]FF[4]SZ[19]
GN[Black kills]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem39/Solution]AP[GoWiki:2009]
DT[2023-01-31]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem39/Solution

Black kills]
PL[B]

AB[rb][ic][jc][rc][kd][md][qd][je][me][pe][qe][of]
AW[qb][kc][lc][mc][nc][nd][pd]
LB[ma:b][na:a]

;B[ob]C[B1]MN[1]
;W[pb]C[W2]MN[2]
;B[oc]C[B3]MN[3]
;W[pc]C[W4]MN[4]
;B[qa]C[B5]MN[5]
;W[jb]C[W6]MN[6]
;B[ib]C[B7]MN[7]
;W[oa]C[W8]MN[8]
;B[lb]C[B9]MN[9]
;W[kb]C[W10]MN[10]

;LB[ma:b][na:a]
)
