[2] She finished fifth in sport pistol shooting at the 2003 European Championships in Plzeň, Czech Republic, and was selected to represent Hungary at the 2004 Summer Olympics.

[1] Erdős also trains under her longtime coach Attila Győrik for Budapest's Central Sports School Association (Hungarian: Központi Sportiskola Sportegyesület).

She managed to get a minimum qualifying score of 580 in the sport pistol to join with her fellow markswoman Zsófia Csonka and gain an Olympic quota place for Hungary, following her fifth-place finish at the European Championships a year earlier.

[3][4] In the 10 m air pistol, held on the third day of the Games, Erdős fired a frustrating 379 out of a possible 400 to share a twenty-first place with three other shooters.

[5] In her signature event, the 25 m pistol, Erdős ended up in an unfortunate aim throughout the competition, as she shot a lowly 278 in the precision stage and 279 in the rapid fire for a total score of 557 points, slipping down to thirty-fourth in a two-way tie with Switzerland's Cornelia Frölich.