(;GM[1]FF[4]SZ[19]
GN[Main Line]
PC[https://senseis.xmp.net/?GokyoShumyoSection2Problem71/Solution]AP[GoWiki:2009]
DT[2023-01-04]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection2Problem71/Solution

Main Line]
PL[B]

AB[db][fb][ec][ed][de][cf][ef][cg][bh]
AW[cb][dc][be][ce][ee][bf]

;B[bb]C[B1]MN[1]
;W[dd]C[W2]MN[2]
;B[fe]C[B3]MN[3]
;W[da]C[W4]MN[4]
;B[cc]C[B5]MN[5]
;W[eb]C[W6]MN[6]
;B[cd]C[B7]MN[7]
;B[bc]C[B9]MN[9]
;W[fa]C[W10]MN[10]

;
)
