(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem5/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem5/Solution

Main line]
PL[W]

AB[db][eb][bc][cc][ce][de]
AW[bb][cb][dc][fc][gc][dd]
CR[aa][ba][ac]
LB[da:a][ae:b]

;W[ab]C[W1]MN[1]
;B[ca]C[B2]MN[2]
;W[cd]C[W3]MN[3]
;B[bd]C[B4]MN[4]
;W[be]C[W5]MN[5]
;B[bf]C[B6]MN[6]
;W[ec]C[W7]MN[7]

;CR[aa][ba][ac]
LB[da:a][ae:b]
)
