A chess prodigy, she earned the title Woman Grandmaster (WGM) at the age of 12 years, four months and two days.

Tied with Russian IM Nadezhda Kosintseva at the end of the 12th round with 9 points each, Lagno won both games of a two-game blitz tie-break playoff to win the championship.

In May 2008, Lagno won the European Individual Women Chess Championships again in Plovdiv, by one-half point in the 11-round open tournament.

In December 2012, Lagno tied for first with Hou Yifan, Humpy Koneru and Anna Muzychuk in the women's rapid chess event of the SportAccord World Mind Games in Beijing, taking the gold medal on tie-break score.

[9] In 2016, Lagno won the gold medal in the women's blitz chess event of the IMSA Elite Mind Games in Huai'an, China.

In December 2018, Lagno won the Women's World Blitz Chess Championship held in St. Petersburg without losing any games.