Denksport Von Keesing

#Quadrilateral figures with one or more convex or concave sides, quadrilateral with one side curved #One quadrilateral #Other irregular parallelograms, trapezia and quadrilaterals, quadrilaterals containing one or more rounded corners #Quadrilaterals with dark surfaces or parts of surfaces #Quadrilaterals containing one or more letters #Letters linked to a figurative element #Letters in light-coloured characters on a dark background #Series of letters separated from one another other than by a single space #Series of letters in different dimensions #Series of letters presenting different forms of writing #Black #White, grey, silver #Red, pink, orange