(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem4/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem4/Solution

Main line]
PL[W]

AB[bp][cp][dq][eq][gq][fr]
AW[bq][cq][dr][er]
LB[aq:c][ar:d][bs:a][cs:b]

;W[br]C[W1]MN[1]

;LB[aq:c][ar:d][bs:a][cs:b]
)
