2021 LUXEMBOURG CLASSIC

#Several quadrilaterals juxtaposed, joined or intersecting #Polygons containing one or more numerals #Letters in light-coloured characters on a dark background #Polygons containing other figurative elements #Polygonal figures with one or more convex or concave sides #Bridges #Series of letters in different dimensions #Numerals in light-coloured characters on a dark background #Letters linked to a figurative element #Series of letters presenting different forms of writing #Five colours and over #Numerals presenting a special form of writing #Polygons containing one or more quadrilaterals (specify the content) #Quadrilaterals with dark surfaces or parts of surfaces #Polygons with one or more truncated or rounded angles #Quadrilaterals containing one or more letters #One polygon #Polygons containing one or more letters