(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem81/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem81/Solution

Main line]
PL[W]

AB[kc][lc][qc][rc][md][nd][pd][oe][qe]
AW[qb][nc][oc][pc][od]
LB[pa:a][lb:b]

;W[rb]C[W1]MN[1]
;B[sb]C[B2]MN[2]
;W[mb]C[W3]MN[3]
;B[ra]C[B4]MN[4]
;W[ob]C[W5]MN[5]
;B[qa]C[B6]MN[6]
;W[na]C[W7]MN[7]

;LB[pa:a][lb:b]
)
