Zeroth Kyu

This term arises from the theory, common in northern Australian go, that the proper handicap between a first kyu and a first dan is approximately two stones. The way of thinking is that different, and the gap in vocabulary and reading is that large.

This implies that there is a strength that is one stone above first kyu, and one stone below first dan. Depending on context, players of this strength can be described as zeroth dan, or zeroth kyu.

There's however no such rank in common systems and the difference between 1d and 1k is 1 stone, i.e. a no komi game.