(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem91/Solution]AP[GoWiki:2009]
DT[2022-12-31]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem91/Solution

Solution]
PL[W]

AB[ib][jb][cc][ec][hc][ed][hd][he][ef][ff][gf]
AW[kb][fc][gc][ic][kc][id][fe][ge][hf][if]

;W[hb]C[W1]MN[1]
;B[gb]C[B2]MN[2]
;W[ha]C[W3]MN[3]
;B[ga]C[B4]MN[4]
;W[fb]C[W5]MN[5]
;B[ia]C[B6]MN[6]
;W[gd]C[W9]MN[9]

;
)
