(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem80/Solution]AP[GoWiki:2009]
DT[2023-02-01]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem80/Solution

Ko]
PL[B]

AB[mb][mc][oc][md][pd][qd][oe][re][se]
AW[nb][ob][qc][rc][rd]

;B[sd]C[B1]MN[1]
;W[pb]C[W2]MN[2]
;B[rb]C[B3]MN[3]
;W[sc]C[W4]MN[4]
;B[na]C[B5]MN[5]
;W[ra]C[W6]MN[6]
;B[qa]C[B7]MN[7]
;W[sb]C[W8]MN[8]

;
)
