What structural feature defines an exceptionally productive walleye 'super spot' contrasting soft substrate?

A hard bottom extension jutting out into a softer basin, such as deep mud.

A highly productive area for walleye, often termed a 'super spot,' is frequently characterized by the subtle presence of hard bottom extensions projecting out into an adjacent softer basin. The critical factor is the contrast in substrate; even a slight, shallow extension composed of hard material interfacing with surrounding deep mud or soft sediment creates an exceptionally appealing feature. This transition zone offers universally desirable characteristics for predators seeking structure, regardless of the specific season or general location across different fisheries.