(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem17/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem17/Solution

Main line]
PL[W]

AB[mc][nc][rc][od][pd][rd][qe][re]
AW[qa][rb][pc][qc][sc][qd]

;B[pb]C[B4]MN[4]
;W[ob]C[W5]MN[5]
;B[oc]C[B6]MN[6]
;W[qb]C[W7]MN[7]

;
)
