(;GM[1]FF[4]SZ[19]
GN[Black to move]
PC[https://senseis.xmp.net/?GokyoSeimyoVolume3Problem51/Solution]AP[GoWiki:2009]
DT[2023-02-16]
C[Diagram from https://senseis.xmp.net/?GokyoSeimyoVolume3Problem51/Solution

Black to move]
PL[B]

AB[pb][qb][mc][qc][jd][kd][pd][qd][le][me][ne][oe]
AW[ob][jc][kc][oc][pc][ld][md][nd]
LB[lb:a][ic:b]

;B[lc]C[B1]MN[1]
;W[nc]C[W2]MN[2]
;B[mb]C[B3]MN[3]
;W[nb]C[W4]MN[4]
;B[ma]C[B5]MN[5]
;W[la]C[W6]MN[6]
;B[kb]C[B7]MN[7]
;W[na]C[W8]MN[8]
;B[jb]C[B9]MN[9]

;LB[lb:a][ic:b]
)
