Marie Sebag (born October 15, 1986 in Paris, France)
is a French chess player, who won the French Chess Championship for women in
2000 and 2002. In 1998 Sebag won the European Youth Chess Championship (girls
under-12), a feat she repeated the next year (girls U14) and in 2002 (girls
U16). In 2004 she shared first place in the World Youth Chess Championship in
the category girls U18 with Jolanta Zawadzka, who defeated her in the
tie-break. In 2006 she reached the quarter-finals during the Women's World
Chess Championship, in which she lost to Svetlana Matveeva.
Sebag was already an IM and a WGM when she scored her
second GM norm during the Hogeschool Zeeland tournament in Vlissingen in August
2007, where she won a game against former FIDE World Champion Rustam
Kasimdzhanov. By securing a third norm during the European Individual Chess
Championship she qualified for the title of Grandmaster in May 2008.