(;GM[1]FF[4]SZ[19]
GN[Variation]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem100/Solution]AP[GoWiki:2009]
DT[2023-02-02]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem100/Solution

Variation]
PL[B]

AB[rb][oc][pc][oe][nf][rf][nh][oh][pi][qi][ri]
AW[rc][pd][qd][re][pf][ph]

;B[qb]C[B1]MN[1]
;W[rg]C[W2]MN[2]
;B[qf]C[B3]MN[3]
;W[qg]C[W4]MN[4]
;B[se]C[B5]MN[5]
;W[qe]C[W6]MN[6]
;B[sc]C[B7]MN[7]
;W[sd]C[W8]MN[8]

;
)
