Mathematics and art through the strings as with a bird cage and to see one form within another which excited me." The artists Theo van Doesburg and Piet Mondrian founded the De Stijl movement, which they wanted to "establish a visual vocabulary elementary geometrical forms comprehensible by all and adaptable to any discipline". Many of their artworks visibly consist of ruled squares and triangles, sometimes also with circles. De Stijl artists worked in painting, furniture, interior design and architecture. After the breakup of De Stijl, Van Doesburg founded the Avant-garde Art Concret movement, describing his 1929–1930 "Arithmetic Composition", a series of four black
Theo van Scheltinga Theo van Scheltinga Tjeerd (Theo) Daniel van Scheltinga (6 March 1914, Amsterdam – 30 July 1994) was a Dutch chess player. FIDE awarded him the International Master title in 1950. Van Scheltinga was one of the leading Dutch players from 1936 to the late 1950s. In 1936 he was third in the Dutch Championship, and he tied for first with Max Euwe in 1947, but lost the playoff 2.5–5.5. He won Hoogovens in 1944 and 1947 and placed 2nd in 1948 and 2nd= in 1949. Van Scheltinga played in three Zonal tournaments, 4th at Hilversum 1947, 6th= at Dublin 1957