Planting seedlings from true seed

[NarnianGarden]

This is not the priority until next spring, but: When growing potatoes from true seed, how deep should I plant the seedlings? As deep as possible, or is there an ideal depth?

Never grew potatoes from true seed before, but will hopefully try next spring
I know the drill with tubers as that is the common way it's done here.
But I love to try the different method.