(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem1/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem1/Solution

Main line]
PL[W]

AB[ob][nc][pc][qc][qe][re]
AW[pb][qb][rb][rc][rd]
CR[ra][sb]

;W[sa]C[W1]MN[1]
;B[pa]C[B2]MN[2]
;W[qa]C[W3]MN[3]
;B[sd]C[B4]MN[4]
;W[sc]C[W5]MN[5]

;CR[ra][sb]
)
