Prins represented the Netherlands twelve times in all Chess Olympiads from 1937 to 1968.

[1] At the beginning of World War II (1939–1940), he played in tournaments in the Netherlands.

In 1940, he won jointly with Salo Landau and Nicolaas Cortlever in Leeuwarden, took 2nd, behind Max Euwe, in Amsterdam (VVGA), and tied for 3rd–4th in Amsterdam (VAS, Hans Kmoch won).

[2] After the war, he took first place at Gijón in 1947,[3] at Hoogovens Beverwijk in 1948 and at Madrid 1951 with 12.5/17, ahead of Herman Steiner, Hermann Pilnik, and Ossip Bernstein.

[4] His final tournament was a large open in Cattolica, Italy in 1993, where he finished in the middle of the field.