[1] Jedynak is a multiple medalist of the Polish Junior Chess Championship: gold in 1994 (U12), silver in 1993 (U12), bronze in 1996 (U14).

From 1999 to 2005, education interrupted Jedynak's participation in chess tournaments.

In 2005, he returned to the chess tournament's and soon completed Grandmaster title norm.

He won outright or shared first place in the following international events: Znojmo (2002), Jarnołtówek (2003), Leutersdorf (2006), Marcy-l'Étoile (2006), Montpellier (2006), Deizisau (2007), Oberwart (2007), Málaga Open (2008), Rewal (2009) and Karpacz (2012).

[3] In 2005, Jedynak graduated from the Faculty of Journalism and Political Science University of Warsaw.