FM (2010); IM (2012); GM (2016).
A member of the famous Alekhine Chess Club, a student at the Goodricke National Chess Academy in Kolkata, and a trainee of Shankar Roy, Diptayan Ghosh became a FIDE Master in 2010 after winning the 2009 Asian U12 Championship.
Ghosh won the U9 Indian championship in Bangalore in 2007, the U10 Asian championships in 2008, the 2009 Asian U12 Championship and the Indian U13 championship in Pondicherry in July 2010 with 9.5/11. He also came =4th at the U10 World Championship in 2008 with 8/11. In 2009, he came =5th with 8/11 in the World U12 and in 2010 he was 2nd with 7/9 in the Asian U12 behind Wei Yi. In May 2011, he came =3rd-8th, scoring a relatively modest 5.5/9 at the Asian U14 Youth Championships, a point behind the winner Girish A Koushik and half a point behind second placed Ahmad Asgarizadeh. In November 2011, he came 4th in the U14 World World Championships with 6.5/9. he placed 9th with 8.5/13 at the 2014 World Junior Championship.
In the 2010 Orissa Open GM tournament, Ghosh was unplaced with a score of 6.5/11, but defeated his first GM opponent Serikbay Bilyalovich Temirbaev 3 months before his 12th birthday. Also in 2010, he won the 2010 Mayor’s Cup in Kolkata with 9/10, and in 2011 he took first place winning the West Bengal State Championship with 9.5/10. In April 2011, he scored 7/9 at the 4th J.K.Newatia Memorial International Open, placing =4th half a point behind the joint leaders GM Jha Sriram, IM Guruswamy Balagurunathan Prakash and IM Sharma Himanshu. In
June 2011, he scored 7.5/13 at the Indian National Challengers Boys, one point off the lead. In September 2011, 13 year old Ghosh came =2nd with 8.5/11 in the 1000-player National Junior Boys held in Goa. In October, he placed =4th, scoring an excellent 8/11 at the Vizag International, half a point from the lead. He scored 8.5/9 in the 23rd Indian school championships in November, and in December 2011, he scored 8.5/9, winning the 7th Asian Schools Championship (U13 Boys).
2012 was a good year for Ghosh, scoring 7/11 in the 4th Chennai International Open (nearly earning an IM norm), 7.5/11 at the 10th Parsvnath International Open held in Delhi (scoring an IM norm) and 5/9 at the Aeroflot Open B (narrowly missing the IM norm) and 9.5/13 at the National Challenger Tournament in Chennai, winning an IM norm. He also came =2nd at the 2012 National Junior in September and won his 3rd IM norm at the Kolkata Open (2012) when he scored 6.5/11, gaining 17 points. 2013 started with a relatively poor 5/10 at the Delhi Open, a result that cost him 15 rating points, but then he clawed back that lost ground, plus a couple, with a solid 5.5/9 at the Moscow Open (2013). He also scored a perfect 9/9 at the 24th The Telegraph Schools' Chess Tournament in Kolkata in January 2013, albeit for a net rating gain of 7.2. He placed =1st alongside Murali Karthikeyan in the Indian National Sub-Junior Championship held in West Bengal in August 2013, scoring 9/11. In March 2013, he scored a par for rating 5.5/10 at the Grandmaster Open in Kolkata.
In April 2013, he won his 1st GM norm with his strong 6.5/9 (+5 =3 -1) result at the 2013 Dubai Open. In June 2014, he came =3rd with 6.5/9 at the XXII Open Internacional Ciutat de Montcada. Grupo A - Spain. In July 2014, he placed =3rd at the 37th International Open at Barbera del Valles in Spain. In August 2014, he scored strongly with 5.5/9 at the Abu Dhabi Masters 2014. He scored 5.5/9 for his team's top board at the 2014 World youth team chess Olympiad. He placed =3rd with 6.5/9 at the 15th Bangkok Chess Club Open 2015 held in April of that year.
Ghosh represented India on board 3 at the 2013 U16 Olympiad, winning team gold and individual silver for his board. (1)
Ghosh has been in the top 100 Juniors of the world since January 2013 when he was 14 years old, and has remained in that group continuously since then. His highest rating to date is 2520 achieved on 1 May 2015.
Main source: FIDE database
(1) http://www.olimpbase.org/playerswy/... , (2) http://wyco2014.chess.hu/?lang=en , (3) http://www.chess-results.com/tnr153...
Wikipedia article: Diptayan Ghosh