(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem72/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem72/Solution

Main line]
PL[W]

AB[bk][ck][dk][el][em][en][eo][cp][dp][bq][cr]
AW[bl][cl][dl][dm][bo][co][do][bp]

;W[bm]C[W1]MN[1]
;B[cn]C[B2]MN[2]
;W[dn]C[W3]MN[3]

;
)
