(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[https://senseis.xmp.net/?GokyoShumyoSection1Problem3/Solution]AP[GoWiki:2009]
DT[2023-01-12]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection1Problem3/Solution

Main line]
PL[B]

AB[ma][nb][ob][qb][rb][pc][rc]
AW[na][kb][mb][mc][nc][oc][qc][qd][rd][pe][qf]
CR[sa]
LB[pa:a][pb:b][sc:c]

;B[ra]C[B1]MN[1]

;CR[sa]
LB[pa:a][pb:b][sc:c]
)
