Think of this pattern in mosaic kniting!
i think you could make this with tunisian. when it gets the the split, you could keep working half the stitches until both halves are long enough and then start stitching across the entire piece again at the other end.
Posts on the topic of вязание added by Татьяна Лобанова
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Autumn Cashmere Studded Rib Cable Crew Sweater in Hemp