I was thinking that there would be an overlay of squares, each identical, like graph paper. As long as the squares contain a relatively small population as compared to the rest of the state, then the two parties are forced to make real choices. And that's the real goal - for both partoes to make real choiced, and not to simply game the system via gerrymandering.

It's kind of a half-assed idea at this point. But I was thinking that, by forcing identically drawn boundaries, then it would force both parties to choose.

Now that I think about it more, it probably wouldn't work. Both parties would just grab squares that guaranteed their victory. It would end up ultra-gerrymandered.