Education
He had studied mathematics in Leyden and Paris.
He had studied mathematics in Leyden and Paris.
De Ronde played for the Netherlands in the 8th Chess Olympiad at Buenos Aires 1939, scoring 8½ in his 14 games. After the tournament, during which World World War II broke out in Europe (September 1939), De Ronde, along with many other participants of the Olympiad (Miguel Najdorf, Gideon Ståhlberg, et al) decided to stay permanently in Argentina.