Sielecki has created a reliable set of opening lines for chess players of almost all levels. The major objective is to dominate Black from the opening, by simple means. You don’t need to sacrifice anything or memorize long tactical lines.

His main concept is for White to play 1.d4, 2.Nf3, 3.g3, 4.Bg2, 5.0-0 and in most cases 6.c4. Sielecki developed this repertoire while working with students who were looking for something that was easy to understand and easy to learn.