Career
She played in the 2008 FIDE Women"s World Chess Championship knockout matches. She has represented the United States, where she currently resides, since December 2008. Foisor represented Romania at the European Youth Chess Championship in various age categories, winning three medals: silver (Ürgüp 2004 Under 16), and two bronze (Budva 2003 Under 14, and Šibenik 2007 Under 18).
She represented Romania twice, in 2004 and 2007, in the European Junior Chess Team Championships, winning three medals: two gold (2004 individual medal, 2007 team medal) and bronze (2007 individual medal).
Foisor was awarded the Woman International Master (WIM) title in 2005. She gained the Woman Grandmaster (WGM) title in June 2007, after scoring 6/9 and finishing equal 3rd in the 2006 Acropolis women"s tournament in Athens, and scoring 7.5/11 and finishing equal 5th in the 2007 European Individual Women"s Chess Championship.
Her result at 2007 European Chess Championship, qualified her for the Women"s World Chess Championship 2008 in Nalchik, Russia. The final armageddon tiebreak game of her first round match against Monika Soćko ended in controversy.
Foisor only needed a draw to advance to the next round, and reached a drawn ending with each player having only a king and a knight.
Although Foisor ran out of time, the arbiter initially ruled that the game was a draw. Soćko appealed, pointing out that what matters is not whether checkmate can be forced, but rather if it is possible. Foisor moved to the United States in 2008 to study at University of Maryland, Baltimore County, and has participated in each of the past five United States. Women"s Chess Championships (2009-2013).
She has represented the United States in three Chess Olympiads, in Khanty-Mansiysk 2010, Istanbul 2012 and Tromsø 2014.