Jan-Krzysztof Duda - Polish chess player, grandmaster from 2013
World Individual Junior Chess Championship (4 medals)
- gold (2008 – Under 10)
- 2 silver (2009 – Under 12, 2015 – Under 20)
- bronze (2010 – Under 12)
European Individual Junior Chess Championship (2 medals)
- gold (2012 – Under 14)
- silver (2011 – Under 14)
European Blitz Chess Championship (1 medal)
- silver (2014)
European Rapid Chess Championship (1 medal)
- gold (2014)
European Youth Team Championship Under 18
- Maribor 2013 – 2nd board (5½/7), gold medal with Team
Polish representative in World & European Chess Championship
- Chess Olympiad (2 times)
- Tromsø 2014 – 3rd board (8½/11)
- Baku 2016 – 2nd board (7/10)
- European Team Championship (2 times)
- Warsaw 2013 – 1st board (5½/9), in Polish team II
- Reykjavík 2015 – 2nd board (5½/9)
Polish Representative in the World Cup - Tromsø 2013 – 1st round
Polish Individual Junior Championship in blitz (3 medals)
- 2 gold (2009 – Under 12, 2011 – Under 18)
- silver (2007 – Under 10)
In 2014 he won bronze medal in the Polish Individual Chess Championship.
Duda won together several dozen medals in the Polish Chess Championship (classical, rapid & blitz) in different age categories.