1999–2005 At junior level, she won the Girls Under 10 section of the
World Youth Chess Championships in 1999 and the Girls Under 14 at the
European Youth Chess Championships in 2001. Lagno was nominated by
FIDE president to play in the 64-player knockout
Women's World Chess Championship 2004, where she was the fifth seed. She reached the third round and lost to eventual runner-up
Ekaterina Kovalevskaya. At the age of 15 she won the 2005
European Individual Women's Championship, held in June in
Chişinău, Moldova. 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. The following year, she won the women's super-tournament "North Urals Cup", attaining a grandmaster
norm in the process.
2008 In May 2008, Lagno won the European Individual Women Chess Championships again in
Plovdiv, by one-half point in the 11-round open tournament.
2009 In 2009, she played for the club "Spartak" that won the Russian team championship and the
European Club Cup in
Ohrid.
2010 In August 2010, Lagno became Women's World Blitz Champion. She finished third in the Grandmaster Group C of the
Tata Steel Chess Tournament 2011 in
Wijk aan Zee. At the
40th Chess Olympiad in
Istanbul in 2012, she won the individual bronze medal for her performance on board one.
2012 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.
2014 In April 2014, Lagno won the
Women's World Rapid Championship in
Khanty-Mansiysk by tie-break over
Alexandra Kosteniuk. On 11 July 2014,
FIDE officially approved her
transition from the Ukrainian Chess Federation to the
Russian Chess Federation, as filed in March 2014.
2016 In 2016, Lagno won the gold medal in the women's blitz chess event of the
IMSA Elite Mind Games in
Huai'an, China.
2018 In November 2018, Lagno lost to world champion
Ju Wenjun in the finals of the
Women's World Championship. In December 2018, Lagno won the Women's
World Blitz Chess Championship held in St. Petersburg without losing any games.
2025 She won the silver medal at FIDE Grand Swiss tournament for Women, finishing 8/11, qualifying for
Women's Candidates Tournament 2026.
2026 Lagno participated in
Women's Candidates Tournament 2026, She was in 1st place contention till the last round, but she lost to
Vaishali R, who won the tournament at 8.5/14, Lagno ended the tournament on 6th place with the score 6.5/14. ==Personal life==