(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem99/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem99/Solution

Main line]
PL[B]

AB[oa][mb][nb][pb][rb][lc][mc][md][rd][me][nf][qf][rf][og][pg][qg][nh]
AW[kb][lb][ob][qb][kc][oc][qc][kd][ld][nd][pd][oe][qe][lf][of][pf][mh][rh][ni][oi][qi]

;B[qa]C[B1]MN[1]
;W[rc]C[W2]MN[2]
;B[sc]C[B3]MN[3]
;W[re]C[W4]MN[4]
;B[se]C[B5]MN[5]
;W[ma]C[W6]MN[6]
;B[sa]C[B7]MN[7]

;
)
