(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?BeginnerExercise251/Solution]AP[GoWiki:2009]
DT[2024-09-18]
C[Diagram from https://senseis.xmp.net/?BeginnerExercise251/Solution

Solution]
PL[B]

AB[na][ra][nb][oc][od][pd][qd][rd][rf]
AW[sa][ob][pb][qb][rb][rc]
CR[sa]
LB[oa:a][qa:b]

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

;CR[sa]
LB[oa:a][qa:b]
)
