(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem80/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem80/Solution

Main line]
PL[B]

AB[gn][co][do][eo][fo][cp][fp][bq][cq][dq][dr]
AW[fl][bm][em][hm][cn][hn][bo][bp][dp][ep][gp][hp][eq][fq][kq][fr]

;B[br]C[B1]MN[1]
;W[cs]C[W2]MN[2]
;B[bs]C[B3]MN[3]
;W[ds]C[W4]MN[4]
;B[er]C[B5]MN[5]
;W[es]C[W6]MN[6]
;B[gq]C[B7]MN[7]
;W[gr]C[W8]MN[8]
;B[fs]C[B9]MN[9]
;W[gs]C[W10]MN[10]

;
)
