(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?BeginnerExercise169/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise169/Solution

Solution]
PL[B]

AB[pa][pb][sb][qc][rc]
AW[oa][ob][rb][oc][pc][qd][rd][sd]
LB[qa:a][qb:b]

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

;LB[qa:a][qb:b]
)
