Born in Lima, Deysi Cori is a WGM with at least six IM norms and an entitlement to an automatic grant of an IM title because of her qualification to the 2013 World Cup. She is the older sister of GM Jorge Cori.
Cori came 2nd in the Women's Continental Championships in September 2009 and then won the World U16 (Girls) championship held in Antalya, Turkey in November 2009 ahead of Meri Arabidze. In October 2010, she was runner up on count back to Narmin Kazimova in the World Girls U18 Championship, both women scoring 9/11 and in November 2010, she scored 5.5/9 in the Pan American Continental Championships, her only loss being to her brother, Jorge. In December 2010, she was eliminated from the first round of the Women's World Chess Championship (2010) by IM Mariya Muzychuk but in June 2011 she came =1st with 7/9 in the Pan-American Absolute Championship (U20) alongside Argentinian FM Leandro Krysa, and =1st with 8.5/11 in the Women's Continental Championship IN Ecuador alongside Cuban WGM Oleiny Linares Napoles . In July 2011 she made a clean sweep of the field with 8/8 at the Pan American Youth (U-18 Women) Tournament. After a modest performance at the World Junior Championship (Girls) (2010), where she scored 8.5/13 to place =7th, she returned the following year to record her greatest triumph so far, to win the World Junior Championships (Girls) (2011) outright with 11/13 (+9 -0 =4), coming from behind with a win in the last round and winning an IM norm. Upon Coriís return to Lima, Peruvian President Humala honored her at a nationally televised award ceremony held at the Golden Hall of the Government Palace by awarding her the medal of honor for sporting achievement, and giving her a 25,000-sol (US$9,100) cash prize. (1) In November 2011, she was the only female in the field that contested the open U18 World Championships. She lost the last round to place =8th, scoring 6/9 for a TPR of 2440. Had she drawn the game, she would have been =5th, and a win would have placed her =2nd. She failed to defend her Junior (Girls) crown by losing the last two rounds to place 6th, a point behind the coleaders of the World Junior Championship (Girls) (2012). She qualified for the FIDE Knock-out Women's World Championship (2012), but lost in the first round to the eventual winner, and 2012 Women's World Champion, Ukrainian IM Anna Ushenina.
In May 2013, she placed 6th in the American Continental Championship and consequently qualified for the World Cup (2013), the only woman to do so via a qualifying tournament apart from Judit Polgar; her opponent in the first round was US super-GM Hikaru Nakamura, to whom she lost and therefore exited the event. In March 2014, she competed in the 7th Women's Championship of the Continental Americas as the rating favorite, but scored only 6/9 to place =4th.
Cori played board 1 for Peru at the Chess Olympiad (Women) (2012) in Istanbul, scoring 7.5/11, and again at the Chess Olympiad (Women) (2014), this time scoring 9.5/11, althought this was insufficient for a medal.
Cori came a strong =11th-33rd (26th place on count back) with a 2562 performance in a field of 640 players in the Cappelle la Grande (2010), earning her another IM norm and just short of a GM norm. In August 2010, Cori played in the 12th International Open at Barcelona, scoring 6.5/10 and defeating tournament winner Tomasz Markowski. In April 2011, she scored 5/9 in the American Continental Tournament in Mexico and in August she won the World Girls Junior Championship (see above). She played top board for Peru at the Chess Olympiad (Women) (2010), scoring 8/11 with a 2424 performance rating. In September 2011, she placed outright first in the 2nd Magistral Diez Reinas held in Buenos Aires, scoring 7.5/9, and in November 2011, she scored 6/9 in the 2nd Latin American Cup. Early 2012 has seen a slight downturn in her fortunes with below par performances in the Moscow Open (4/9) and in the Aeroflot Open B (4/9), slicing 29 points from her rating, but a strong 6/9 at the XX Open Ciutat de Montcada in July 2012 and an equally strong 7/10 at the 22nd International Open in Benasque restored the balance while a further result of 7/10 in the powerful Simon Bolivar Tournament in Venezuela in September and October boosted her rating stocks significantly, and also won her another (her 2nd) IM norm, again narrowly missing a GM norm. Like her brother, she scored 6/9 in the Chigorin Memorial (2012), adding a few points to her rating card. However, she started 2013 with a relatively poor 5/9 (+4 =2 -3) at the Copa IPD 2013 "Categoria Especial" in Peru; one of her three losses was to the tournament winner, her brother, Jorge. She gained a measure of revenge by beating Jorge in the 1st Magistral IPD in Lima in February 2013, where she scored at least her 6th IM norm, and picking up 13 rating points for her 5.5/9. A few days later at the 2nd Magistral IPD, she scored a less auspicious 5/10, losing 6 rating points, but still managed to notch a win against Chilean GM Rodrigo Rafael Vasquez Schroeder. In May-June 2013, she came =1st (along with her brother Jorge and others) at the 1st Arequipa International in Peru, scoring 5.5/7.
In June 2014, Cori played in the XXII International Open in Montcada i Reixac, in Spain, scoring a respectable 5.5/9, a point and a half behind the joint winners Ni Hua and Yaroslav Zherebukh. In the following month (July 2014), she scored 6/9 at the 35th International Open at Benasque in Spain. Immediately afterwards, she participated in the 16th International Sant Marti Open in Barcelona where she scored 5/9.
Cori's rating as at 1 September 2014 was 2425, making her the #1 woman in Peru and #3 woman in the Americas behind Irina Krush and Anna Zatonskih. She is also Peru's #11 player overall. She has at least 6 IM norms and an automatic qualification as an IM through her qualification to the 2013 World Cup, and the requisite rating for an IM, but it is unclear why she has not yet been awarded the title as she appears to have more than fulfilled all the prerequisites since 2010. (2)
(1): http://www.andina.com.pe/Ingles/Not...; (2) IM title application from 2010: http://ratings.fide.com/title_appli...
Wikipedia article: Deysi Cori