(;GM[1]FF[4]SZ[19]
GN[a above]
PC[https://senseis.xmp.net/?XuanxuanQijingProblem158/Solution]AP[GoWiki:2009]
DT[2023-02-08]
C[Diagram from https://senseis.xmp.net/?XuanxuanQijingProblem158/Solution

a above]
PL[B]

AB[bm][dm][an][cn][bo][do][eo][bp][ep][gp][fq][br][cr][gr]
AW[co][ap][cp][dp][bq][cq][eq][er][fr][gs]

;B[hr]C[B1]MN[1]
;W[ar]C[W2]MN[2]
;B[dr]C[B3]MN[3]
;W[dq]C[W4]MN[4]
;B[bs]C[B5]MN[5]
;W[ds]C[W6]MN[6]
;B[fs]C[B7]MN[7]
;W[cs]C[W8]MN[8]
;B[es]C[B9]MN[9]

;
)
