Nancy Roos

Nancy Roos (February 28, 1905 – April 6, 1957) was a U.S. chess champion.

Born Nancy Krotoschin in Belgium, she married Martin Roos. Before coming to America she was active at the Cercle l'Echiquier in Brussels. Roos won the U.S. Women's Chess Championship in 1955 with Gisela Kahn Gresser, both scoring 9–2. She took second at the Pan-American Tournament in 1954 behind Mary Bain and Mona May Karff, and tied for second at the 1942 U.S. Women's Championship behind Adele Belcher and Karff. Roos was a professional photographer and at the time of her death was the second highest rated woman in the U.S. Chess Federation. She died of cancer in Los Angeles, California.