(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem19/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem19/Solution

Main line]
PL[B]

AB[ob][nc][oc][qc][rc][pd]
AW[mb][nb][pb][mc][md][nd][od][rd][pe][qe]

;B[pa]C[B1]MN[1]
;W[qa]C[W2]MN[2]
;B[oa]C[B3]MN[3]
;W[rb]C[W4]MN[4]
;B[sb]C[B5]MN[5]
;W[qb]C[W6]MN[6]
;B[ra]C[B7]MN[7]
;W[sa]C[W8]MN[8]
;B[sc]C[B9]MN[9]

;
)
