(;GM[1]FF[4]SZ[19]
GN[Main Line to Ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem70/Solution]AP[GoWiki:2009]
DT[2023-01-03]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem70/Solution

Main Line to Ko]
PL[B]

AB[fn][do][go][jo][jp][lp][cq][dq][gq][kq][cr][lr]
AW[fo][eq][fq][iq][jq][dr][gr]

;B[gp]C[B1]MN[1]
;W[fs]C[W2]MN[2]
;B[hs]C[B3]MN[3]
;W[ir]C[W4]MN[4]
;B[gs]C[B5]MN[5]
;W[er]C[W6]MN[6]
;B[hr]C[B7]MN[7]
;W[hq]C[W8]MN[8]
;B[fr]C[B9]MN[9]

;
)
