Szidónia Vajda ( born January 20, 1979 in Odorheiu Secuiesc, Hungarian Székelyudvarhely ) is a szeklerische chess champion, who now occupies only for Romania for Hungary. Her brother, the chess grandmaster Levente Vajda, plays only for Romania.
Vajda received in 1998 the title of chess grandmaster of women ( WGM ), 2003 the title of International Master (IM).
Vajda won or occupied top positions in several tournaments: 2nd place in a women's tournament in Baile Herculane (1994 ), 1st place in the U16 European Championship ( Girls ) (1995 ), 1st place in the FS02 - woman tournament in Budapest (1995 ), 2nd place in the FS06 tournament in Budapest (1996 ), 2nd place in a women's tournament in Bucharest (1997 ), 2nd place in a women's tournament in Rijeka (2001), 2nd place in the Mediterranean - Flower- woman tournament ( 2003 ), 1st place in the Championship of Hungary ( women) (2004) and 1st place in Ede Teller Memorial ( women) in Paks ( 2009).
For the Romanian women's national team played in the European Team Championship in 1999, when Romania won the bronze medal. For Hungary, they played in the European Team Championships in 2003, 2005, 2007 and 2009. Hungary was with her 2003 runner-up, where she was awarded an individual bronze medal for their results by 3.5 points from 5 games on the third board. In 2009, she played on top board. For Hungary, she also played in the Mitropa Cup in 2007 and in the Chess Olympiads of 2002, 2004, 2006, 2008 and 2010. 2004 she received an individual gold medal for her score of 9 out of 12 on the second board with an Elo performance of 2541st
With their best Elo rating of 2418 in January 2008 Vajda finished in 47th place of the FIDE world ranking of women and the third place of the Hungarian woman rankings.