This is essentially just no-pass go (in both cases the first player that has to “suicide” a group (fill the second-to-last eye) might as well resign in practice - or is this not true of redstone?).
Hopefully I’ll get around to making the post about no-pass go in Weird and wonderful consequences of simple rules soon. The territory-filling stage works almost identically in redstone, I think (the diagram I gave above is a no-pass example that “happens” to work the same way in redstone).