(;GM[1]FF[4]SZ[19]
GN[Black kills]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem89/Solution]AP[GoWiki:2009]
DT[2023-02-01]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem89/Solution

Black kills]
PL[B]

AB[nb][pb][oc][md][nd][me][pf][ng][pg][rg][qh]
AW[nc][qc][od][ne][pe][re][qf]

;B[rb]C[B1]MN[1]
;W[pc]C[W2]MN[2]
;B[mc]C[B3]MN[3]
;W[qb]C[W4]MN[4]
;B[qa]C[B5]MN[5]
;W[rc]C[W6]MN[6]
;B[qd]C[B7]MN[7]

;
)
