(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem71/Solution]AP[GoWiki:2009]
DT[2022-12-31]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem71/Solution

Solution]
PL[B]

AB[kb][cc][ec][kc][ed][id][kd][fe][ge][he][ie][je]
AW[jb][hc][jc][fd][gd][jd][ee][ke][ef][ff][jf][kf][hg]

;B[ic]C[B1]MN[1]
;W[ib]C[W2]MN[2]
;B[gc]C[B3]MN[3]
;W[fc]C[W4]MN[4]
;B[gb]C[B5]MN[5]
;W[hd]C[W6]MN[6]
;B[fb]C[B7]MN[7]
;W[hb]C[W8]MN[8]
;B[ja]C[B9]MN[9]

;
)
