His father intended to divide the duchy of Poland between his sons, but Bolesław succeeded in displacing his stepmother and stepbrothers to become the sole ruler of Poland.
Tema isa kavatses Poola hertsogkonna oma poegade vahel jagada, kuid Bolesławil õnnestus oma võõrasema ja poolvennad kõrvale tõrjuda, et Poola ainuvalitsejaks saada.