In 1950 she took part to The Gijón  International Chess Tournament, she scored 3,5 points.  Silans represented France at the Moscow tournament, which had to decide who would succeed Vera Menchik as the woman World Champion. Chantal Chaudé de Silans was leading the field for a good part of the tournament but tired at the end, ending up being tied for fifth place out of sixteen players. Despite having to take care of four children, she participated again to the Women's World Championships in 1952 and 1955 (Moscow), and again in 1961 (at Vrnjacka Banja), ending up respectively tied for eighth place, tied for 10th and in 12th place. She was part of the national French team at the 9th Chess Olympiad held in Dubrovnik in 1950, becoming the first woman ever to participate in this competition. She was also the first woman to ever take part to the French Chess Championship (men's section), finishing seventh in 1947. Her shared third place in 1951 is still to this day the best result by a woman at the French Championship.